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Aryl halide

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The aryl halides produced on the largest scale are chlorobenzene and the isomers of dichlorobenzene. One major but discontinued application was the use of chlorobenzene as a solvent for dispersing the herbicide Lasso. Overall, production of aryl chlorides (also naphthyl derivatives) has been
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derivatives. Arenes with electron donating groups react with halogens even in the absence of Lewis acids. For example, phenols and anilines react quickly with chlorine and bromine water to give multihalogenated products. Many detailed laboratory procedures are available. For alkylbenzene
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were used extensively from the 1930s to 1950s in cable and capacitor production, due to their insulating, hydrophobic, and flame retardant properties, but they have since been phased out for this use due to toxicity, environmental persistence, and introduction of new materials.
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Unlike in most other substitution reactions, fluoride is the best leaving group, and iodide the worst. A 2018 paper indicates that this situation may actually be rather common, occurring in systems that were previously assumed to proceed via
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Aryl chlorides are the aryl halides produced on the largest scale commercially: 150,000 tons/y in the US alone (1994). Production levels are decreasing owing to environmental concerns. Chlorobenzenes are used mainly as solvents.
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because they exhibit many differences in methods of preparation and properties. The most important members are the aryl chlorides, but the class of compounds is so broad that there are many derivatives and applications.
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The C-X distances for aryl halides follow the expected trend. These distances for fluorobenzene, chlorobenzene, bromobenzene, and methyl 4-iodobenzoate are 135.6(4), 173.90(23), 189.8(1), and 209.9
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This method is applicable to the preparation of all aryl halides. One limitation is that most, but not all, aryl lithium and Grignard reagents are produced from aryl halides.
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Many chlorinated and brominated aromatic compounds are produced by marine organisms. The chloride and bromide in ocean waters are the source of the halogens. Various
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The halides can be displaced by strong nucleophiles via reactions involving radical anions. Alternatively aryl halides, especially the bromides and iodides, undergo
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Unlike typical alkyl halides, aryl halides typically do not participate in conventional substitution reactions. Aryl halides with electron-withdrawing groups in the
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Siegemund, Günter; Schwertfeger, Werner; Feiring, Andrew; Smart, Bruce; Behr, Fred; Vogel, Herward; McKusick, Blaine (2000). "Pyridine and Pyridine Derivatives".
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Mondal, Santanu; Raja, Karuppusamy; Schweizer, Ulrich; Mugesh, Govindasamy (2016). "Chemistry and Biology in the Biosynthesis and Action of Thyroid Hormones".
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Siegemund, Günter; Schwertfeger, Werner; Feiring, Andrew; Smart, Bruce; Behr, Fred; Vogel, Herward; McKusick, Blaine (2002). "Fluorine Compounds, Organic".
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conditions, whereas ring halogenation is favored in the presence of Lewis acids. The decolouration of bromine water by electron-rich arenes is used in the
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Snieckus, Victor (1990). "Directed ortho metalation. Tertiary amide and O-carbamate directors in synthetic strategies for polysubstituted aromatics".
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sp. nov., a novel bioprocessor isolated actinomycete with the ability to degrade chlorobenzene, dichlorobenzene and phenol as sole carbon sources".
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Aryl fluorides are used as synthetic intermediates, e.g. for the preparation of pharmaceuticals, pesticides, and liquid crystals. The conversion of
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includes halogenated derivatives of any aromatic compound, it commonly refers to halobenzenes, which are specifically halogenated derivatives of
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Brito, Juan P.; Ross, Joseph S.; El Kawkgi, Omar M.; Maraka, Spyridoula; Deng, Yihong; Shah, Nilay D.; Lipska, Kasia J. (2021).
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can also be used to convert diazonium salts to bromobenzenes using using copper-based reagents. Owing to high cost of
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of benzene has been well investigated, motivated by the avoidance of HCl as a coproduct in the direct halogenation:
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can also be used to convert diazonium salts to chlorobenzenes using copper-based reagents. Owing to high cost of
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Shimizu, Masaki; Hiyama, Tamejiro (2005). "Modern Synthetic Methods for Fluorine-Substituted Target Molecules".
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Electrophilic HalogenationReaction Pathways Involving Attack by Electrophilic Halogens on Unsaturated Compounds
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is a well established route to aryl fluorides. Thus, anilines are precursors to aryl fluorides. In the classic
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Aryl iodides can be prepared by treating diazonium salts with iodide salts. Electron-rich arenes such as
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containing at least two different types of halogens bonded to the same benzene ring. There are also many
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Beck, U.; Löser, E. (2011). "Chlorinated Benzenes and Other Nucleus-Chlorinated Aromatic Hydrocarbons".
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reaction, aryl halides are converted to aryl lithium compounds. Illustrative is the preparation of
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reactions. For example, 2,4-dinitrochlorobenzene reacts in basic solution to give a phenol.
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Gribble, Gordon W. (2004). "Natural Organohalogens: A New Frontier for Medicinal Agents?".
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Jacobsen, Eric N.; Harrison A. Besser; Zeng, Yuwen; Kwan, Eugene E. (September 2018).
1580: 1549: 1510: 1492: 1445: 1427: 1378: 1312: 1260: 1211: 1174: 1085: 1052: 1020: 994: 969: 924: 891: 706:, to give organometallic derivatives that function as sources of aryl anions. By the 478: 70: 32: 20: 1246: 1572: 1541: 1500: 1484: 1435: 1419: 1370: 1347: 1302: 1294: 1250: 1242: 1203: 1166: 1141: 1114: 1077: 1029: 961: 916: 883: 754: 538: 417: 403: 1374: 1081: 805: 576: 535: 364: 295: 267: 1545: 1298: 853:
Aryl bromides are widely used as fire-retardants. The most prominent member is
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Oberhammer, Heinz (2009). "The Structural Chemistry of Carbon-Halogen Bonds".
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is poorly reactive toward bromine, necessitating the use of acidic media.
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Lyday, Phyllis A.; Kaiho, Tatsuo (2015). "Iodine and Iodine Compounds".
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Many commercial aryl fluorides are produced from aryl chlorides by the
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Ritter, Tobias; Hooker, Jacob M.; Neumann, Constanze N. (June 2016).
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The chemical structure of 6,6′-dibromoindigo, the main component of
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Atkinson, Edward R.; Murphy, Donald M.; Lufkin, James E. (1951). "
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declining since the 1980s, in part due to environmental concerns.
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Aromatic compounds containing Halogen atom(s) in place of Hydrogen
1400:"Concerted nucleophilic aromatic substitution with 19F− and 18F−" 1158: 908: 699: 680: 676: 668: 458: 410: 272: 599: 561:
by electrophilic iodination of tyrosine derivative. Synthetic T
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Reaction between benzene and halogen to form an halogenobenzene
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Monochlorination of benzene is accompanied by formation of the
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Janssen, Donald E.; Wilson, C. V. (1956). "4-Iodoveratrole".
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is one of the most heavily prescribed medicines in the U.S.
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Ioffe, D.; Kampf, A. (2002). "Bromine, Organic Compounds".
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in which one or more hydrogen atoms, directly bonded to an
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or "direct chlorination" is the main synthesis route.
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and dimethoxy derivatives react directly with iodine.
1051:. Englewood Cliffs, N.J: Prentice Hall. p. 947. 51: 1013: 1397: 1231:"Levothyroxine Use in the United States, 2008-2018" 693: 343:, this method is reserved for specialty chlorides. 386:, this method is reserved for specialty bromides. 667:Aryl halides often react via the intermediacy of 493:Halopyridines are based on the aromatic compound 351:The main aryl bromides produced commercially are 1598: 275:, the alkyl positions tend to be halogenated by 1569:Kirk-Othmer Encyclopedia of Chemical Technology 1465:"Concerted nucleophilic aromatic substitutions" 594:, is an aryl chloride isolated from soil fungi. 1162:Ullmann's Encyclopedia of Industrial Chemistry 1074:Ullmann's Encyclopedia of Industrial Chemistry 958:Ullmann's Encyclopedia of Industrial Chemistry 912:Ullmann's Encyclopedia of Industrial Chemistry 367:. They are produced by direct bromination of 1277: 1104: 873: 1527: 332:This technology is not widely used however. 512: 420:react with iodine to give the aryl halide: 1566: 1364: 1071: 1047:Boyd, Robert W.; Morrison, Robert (1992). 698:Aryl halides react with metals, generally 124:In some cases, the fluoride salt is used: 1504: 1439: 1306: 1254: 955: 951: 949: 947: 945: 943: 941: 529: 1131: 989:Peter Bernard, David De la Mare (1976). 783:Chlorobenzene was once the precursor to 598: 581: 443:Halobenzenes and halobenzene derivatives 285: 1577:10.1002/0471238961.0218151325150606.a01 1329: 1283:"What's New in Enzymatic Halogenations" 1196:Angewandte Chemie International Edition 1040: 876:Angewandte Chemie International Edition 1599: 1367:PATai's Chemistry of Functional Groups 1018:-4,4′,6,6′-Tetrachlorodiphenic Acid". 938: 517:Halogenated naphthalenes are based on 438:Classification according to aryl group 1528:Rehfuss, Marc; Urban, James (2005). " 787:, which is now made by oxidation of 613: 553:) are aryl iodides. A tetraiodide, T 170:. Illustrative is the synthesis of 1534:Systematic and Applied Microbiology 1287:Current Opinion in Chemical Biology 394:Synthetic aryl iodides are used as 13: 767: 759: 685: 52:Classification according to halide 14: 1628: 794: 461:. Groups of halobenzenes include 212: 56: 1281:; Walsh, Christopher T. (2007). 821:is produced from chlorobenzene: 694:Organometallic reagent formation 488: 346: 43:. Haloarenes are different from 1560: 1521: 1456: 1391: 1358: 1323: 1271: 1247:10.1001/jamainternmed.2021.2686 1222: 1187: 1152: 811: 630: 389: 363:. These materials are used as 1125: 1098: 1065: 1007: 993:. Cambridge University Press. 982: 902: 867: 1: 1375:10.1002/9780470682531.pat0002 1332:Journal of Chemical Education 1082:10.1002/14356007.a14_381.pub2 860: 804:is a bacterium that degrades 236:, is produced by this route: 625: 523:Polychlorinated naphthalenes 353:tetrabromophthalic anhydride 7: 1546:10.1016/j.syapm.2005.05.011 222:Friedel-Crafts halogenation 168:electron-withdrawing groups 10: 1633: 1299:10.1016/j.cbpa.2007.08.002 778:Buchwald–Hartwig amination 776:, and thus are subject to 662: 446: 1489:10.1038/s41557-018-0079-7 1279:Fujimori, Danica Galonić 1171:10.1002/14356007.a22_399 1119:10.15227/orgsyn.036.0046 1034:10.15227/orgsyn.031.0096 966:10.1002/14356007.o06_o03 921:10.1002/14356007.a11_349 808:as sole carbon sources. 513:Halogenated naphthalenes 400:cross-coupling reactions 1165:. Weinheim: Wiley-VCH. 915:. Weinheim: Wiley-VCH. 643:positions, can undergo 483:halobenzene derivatives 357:decabromodiphenyl ether 73:is the fluoride donor: 39:ring are replaced by a 1530:Rhodococcus phenolicus 1235:JAMA Internal Medicine 1208:10.1002/anie.201601116 888:10.1002/anie.200460441 801:Rhodococcus phenolicus 764: 708:metal-halogen exchange 690: 610: 596: 530:Aryl halides in nature 416:Aryl lithium and aryl 291: 855:tetrabromobisphenol-A 763: 689: 602: 585: 396:X-ray contrast agents 361:tetrabromobisphenol-A 289: 753:Direct formation of 671:. Chlorobenzene and 176:2-nitrochlorobenzene 172:2-fluoronitrobenzene 1481:2018NatCh..10..917K 1424:10.1038/nature17667 1416:2016Natur.534..369N 1344:2004JChEd..81.1441G 1146:10.1021/cr00104a001 1612:Aromatic compounds 1352:10.1021/ed081p1441 819:Triphenylphosphine 774:oxidative addition 765: 691: 611: 597: 479:mixed halobenzenes 453:Although the term 402:and conversion to 380:Gatterman reaction 373:Phthalic anhydride 371:and aryl ethers. 337:Gatterman reaction 292: 271:derivatives, e.g. 230:iron(III) chloride 67:Schiemann reaction 1410:(7607): 369–373. 1384:978-0-470-68253-1 1241:(10): 1402–1405. 1202:(27): 7606–7630. 1107:Organic Syntheses 1076:. pp. 1–13. 1058:978-0-13-643669-0 1049:Organic chemistry 1021:Organic Syntheses 780:-type reactions. 755:Grignard reagents 683:by this pathway. 614:Structural trends 418:Grignard reagents 404:Grignard reagents 195:Cl + KF → O 71:tetrafluoroborate 33:aromatic compound 21:organic chemistry 1624: 1591: 1590: 1564: 1558: 1557: 1525: 1519: 1518: 1508: 1469:Nature Chemistry 1460: 1454: 1453: 1443: 1395: 1389: 1388: 1362: 1356: 1355: 1327: 1321: 1320: 1310: 1275: 1269: 1268: 1258: 1226: 1220: 1219: 1191: 1185: 1184: 1156: 1150: 1149: 1134:Chemical Reviews 1129: 1123: 1122: 1102: 1096: 1095: 1069: 1063: 1062: 1044: 1038: 1036: 1011: 1005: 1004: 986: 980: 979: 953: 936: 934: 906: 900: 899: 871: 675:react in liquid 622:, respectively. 539:triiodothyronine 536:thyroid hormones 497:. This includes 430: 365:flame retardants 328: 262: 208: 158: 145: 144: 141: 120: 103: 102: 99: 94: 93: 90: 1632: 1631: 1627: 1626: 1625: 1623: 1622: 1621: 1597: 1596: 1595: 1594: 1587: 1565: 1561: 1526: 1522: 1461: 1457: 1396: 1392: 1385: 1363: 1359: 1328: 1324: 1276: 1272: 1227: 1223: 1192: 1188: 1181: 1157: 1153: 1130: 1126: 1103: 1099: 1092: 1070: 1066: 1059: 1045: 1041: 1012: 1008: 1001: 987: 983: 976: 954: 939: 931: 907: 903: 872: 868: 863: 848: 844: 840: 836: 832: 828: 814: 806:dichlorobenzene 797: 770: 768:Other reactions 748: 744: 740: 736: 696: 665: 659:Ar mechanisms. 658: 648: 633: 628: 616: 609: 595: 590:, an important 577:bromoperoxidase 564: 556: 552: 544: 532: 515: 499:chloropyridines 491: 451: 445: 440: 429:→ ArI + LiI 428: 424: 392: 384:diazonium salts 349: 341:diazonium salts 326: 322: 318: 314: 310: 306: 302: 296:oxychlorination 268:dichlorobenzene 260: 256: 252: 248: 244: 240: 215: 206: 202: 198: 194: 190: 186: 182: 157: 153: 149: 142: 139: 138: 136: 132: 128: 119: 115: 111: 107: 100: 97: 96: 91: 88: 87: 85: 81: 77: 63:diazonium salts 59: 54: 27:(also known as 17: 12: 11: 5: 1630: 1620: 1619: 1614: 1609: 1593: 1592: 1586:978-0471238966 1585: 1559: 1540:(8): 695–701. 1520: 1475:(9): 917–923. 1455: 1390: 1383: 1357: 1322: 1270: 1221: 1186: 1180:978-3527306732 1179: 1151: 1140:(6): 879–933. 1124: 1097: 1090: 1064: 1057: 1039: 1006: 999: 981: 975:978-3527306732 974: 937: 930:978-3527306732 929: 901: 882:(2): 214–231. 865: 864: 862: 859: 851: 850: 846: 842: 838: 834: 830: 826: 813: 810: 796: 795:Biodegradation 793: 769: 766: 751: 750: 746: 742: 738: 734: 695: 692: 664: 661: 656: 646: 632: 629: 627: 624: 615: 612: 603: 586: 562: 559:biosynthesised 554: 550: 542: 531: 528: 514: 511: 503:bromopyridines 490: 487: 467:chlorobenzenes 463:fluorobenzenes 447:Main article: 444: 441: 439: 436: 432: 431: 426: 391: 388: 348: 345: 330: 329: 324: 320: 316: 312: 311:+ 4 HCl + O 308: 304: 264: 263: 258: 254: 250: 246: 242: 214: 213:Aryl chlorides 211: 210: 209: 204: 200: 196: 192: 188: 184: 160: 159: 155: 151: 147: 134: 130: 122: 121: 117: 113: 109: 105: 83: 79: 58: 57:Aryl fluorides 55: 53: 50: 15: 9: 6: 4: 3: 2: 1629: 1618: 1617:Organohalides 1615: 1613: 1610: 1608: 1605: 1604: 1602: 1588: 1582: 1578: 1574: 1570: 1563: 1555: 1551: 1547: 1543: 1539: 1535: 1531: 1524: 1516: 1512: 1507: 1502: 1498: 1494: 1490: 1486: 1482: 1478: 1474: 1470: 1466: 1459: 1451: 1447: 1442: 1437: 1433: 1429: 1425: 1421: 1417: 1413: 1409: 1405: 1401: 1394: 1386: 1380: 1376: 1372: 1368: 1361: 1353: 1349: 1345: 1341: 1337: 1333: 1326: 1318: 1314: 1309: 1304: 1300: 1296: 1293:(5): 553–60. 1292: 1288: 1284: 1280: 1274: 1266: 1262: 1257: 1252: 1248: 1244: 1240: 1236: 1232: 1225: 1217: 1213: 1209: 1205: 1201: 1197: 1190: 1182: 1176: 1172: 1168: 1164: 1163: 1155: 1147: 1143: 1139: 1135: 1128: 1120: 1116: 1112: 1108: 1101: 1093: 1091:9783527306732 1087: 1083: 1079: 1075: 1068: 1060: 1054: 1050: 1043: 1035: 1031: 1027: 1023: 1022: 1017: 1010: 1002: 1000:9780521290142 996: 992: 985: 977: 971: 967: 963: 959: 952: 950: 948: 946: 944: 942: 932: 926: 922: 918: 914: 913: 905: 897: 893: 889: 885: 881: 877: 870: 866: 858: 856: 824: 823: 822: 820: 809: 807: 803: 802: 792: 790: 786: 781: 779: 775: 762: 758: 756: 741:Br + BuLi → C 732: 731: 730: 728: 724: 723:-butyllithium 722: 717: 713: 712:phenyllithium 709: 705: 701: 688: 684: 682: 678: 674: 670: 660: 652: 650: 642: 638: 623: 621: 607: 606:Tyrian Purple 601: 593: 589: 584: 580: 578: 574: 571: 566: 560: 548: 540: 537: 527: 524: 520: 510: 508: 507:agrochemicals 504: 500: 496: 489:Halopyridines 486: 484: 480: 477:, as well as 476: 472: 471:bromobenzenes 468: 464: 460: 456: 450: 435: 423: 422: 421: 419: 414: 412: 407: 405: 401: 397: 387: 385: 381: 376: 374: 370: 366: 362: 358: 354: 347:Aryl bromides 344: 342: 338: 333: 301: 300: 299: 297: 288: 284: 282: 278: 274: 269: 239: 238: 237: 235: 234:chlorobenzene 231: 227: 223: 219: 181: 180: 179: 177: 173: 169: 165: 164:Halex process 127: 126: 125: 76: 75: 74: 72: 68: 64: 49: 46: 42: 38: 34: 30: 26: 22: 1568: 1562: 1537: 1533: 1529: 1523: 1472: 1468: 1458: 1407: 1403: 1393: 1366: 1360: 1338:(10): 1441. 1335: 1331: 1325: 1290: 1286: 1273: 1238: 1234: 1224: 1199: 1195: 1189: 1160: 1154: 1137: 1133: 1127: 1110: 1106: 1100: 1073: 1067: 1048: 1042: 1025: 1019: 1015: 1009: 990: 984: 957: 910: 904: 879: 875: 869: 852: 837:+ 6 Na → P(C 815: 812:Applications 799: 798: 782: 771: 752: 726: 720: 716:bromobenzene 697: 673:sodium amide 666: 653: 640: 636: 634: 631:Substitution 617: 567: 533: 516: 492: 475:iodobenzenes 454: 452: 433: 415: 408: 393: 390:Aryl iodides 377: 350: 334: 331: 293: 281:bromine test 277:free radical 265: 220: 216: 161: 123: 60: 28: 24: 18: 749:Li + BuBr 519:naphthalene 455:aryl halide 449:Halobenzene 226:Lewis acids 45:haloalkanes 25:aryl halide 1607:Haloarenes 1601:Categories 861:References 592:antibiotic 588:Vancomycin 570:peroxidase 425:ArLi + I 261:Cl + HCl 1497:1755-4349 1432:1476-4687 704:magnesium 626:Reactions 547:thyroxine 207:F + KCl 146:]F → C 29:haloarene 1554:16261859 1515:30013193 1450:27281221 1317:17881282 1265:34152370 1216:27226395 896:15614922 849:+ 6 NaCl 833:Cl + PCl 729:-BuLi): 679:to give 669:benzynes 495:pyridine 411:anilines 323:Cl + H 37:aromatic 31:) is an 1506:6105541 1477:Bibcode 1441:4911285 1412:Bibcode 1340:Bibcode 1308:2151916 1256:8218227 700:lithium 681:aniline 677:ammonia 663:Benzyne 575:(e.g., 573:enzymes 459:benzene 369:phenols 315:→ 4 C 273:toluene 228:, e.g. 154:F + N 112:F + N 1583:  1552:  1513:  1503:  1495:  1448:  1438:  1430:  1404:Nature 1381:  1315:  1305:  1263:  1253:  1214:  1177:  1113:: 46. 1088:  1055:  1028:: 96. 997:  972:  927:  894:  789:cumene 785:phenol 718:using 545:) and 473:, and 359:, and 129:[C 78:[C 41:halide 714:from 637:ortho 253:→ C 249:+ Cl 174:from 116:+ BF 104:→ C 23:, an 1581:ISBN 1550:PMID 1511:PMID 1493:ISSN 1446:PMID 1428:ISSN 1379:ISBN 1313:PMID 1261:PMID 1212:PMID 1175:ISBN 1086:ISBN 1053:ISBN 995:ISBN 970:ISBN 925:ISBN 892:PMID 641:para 639:and 534:The 501:and 378:The 335:The 294:The 1573:doi 1542:doi 1501:PMC 1485:doi 1436:PMC 1420:doi 1408:534 1371:doi 1348:doi 1303:PMC 1295:doi 1251:PMC 1243:doi 1239:181 1204:doi 1167:doi 1142:doi 1115:doi 1078:doi 1030:doi 962:doi 917:doi 884:doi 825:3 C 702:or 557:is 303:4 C 95:]BF 19:In 1603:: 1579:. 1571:. 1548:. 1538:28 1536:. 1509:. 1499:. 1491:. 1483:. 1473:10 1471:. 1467:. 1444:. 1434:. 1426:. 1418:. 1406:. 1402:. 1377:. 1369:. 1346:. 1336:81 1334:. 1311:. 1301:. 1291:11 1289:. 1285:. 1259:. 1249:. 1237:. 1233:. 1210:. 1200:55 1198:. 1173:. 1138:90 1136:. 1111:36 1109:. 1084:. 1026:31 1024:. 1016:dl 968:. 960:. 940:^ 923:. 890:. 880:44 878:. 649:Ar 620:pm 549:(T 541:(T 521:. 509:. 485:. 469:, 465:, 355:, 283:. 199:NC 187:NC 178:: 69:, 1589:. 1575:: 1556:. 1544:: 1517:. 1487:: 1479:: 1452:. 1422:: 1414:: 1387:. 1373:: 1354:. 1350:: 1342:: 1319:. 1297:: 1267:. 1245:: 1218:. 1206:: 1183:. 1169:: 1148:. 1144:: 1121:. 1117:: 1094:. 1080:: 1061:. 1037:. 1032:: 1003:. 978:. 964:: 935:. 933:. 919:: 898:. 886:: 847:3 845:) 843:5 841:H 839:6 835:3 831:5 829:H 827:6 747:5 745:H 743:6 739:5 737:H 735:6 733:C 727:n 725:( 721:n 657:N 655:S 647:N 645:S 608:. 563:4 555:4 551:4 543:3 427:2 327:O 325:2 321:5 319:H 317:6 313:2 309:6 307:H 305:6 259:5 257:H 255:6 251:2 247:6 245:H 243:6 241:C 205:4 203:H 201:6 197:2 193:4 191:H 189:6 185:2 183:O 156:2 152:5 150:H 148:6 143:2 140:+ 137:N 135:5 133:H 131:6 118:3 114:2 110:5 108:H 106:6 101:4 98:− 92:2 89:+ 86:N 84:5 82:H 80:6

Index

organic chemistry
aromatic compound
aromatic
halide
haloalkanes
diazonium salts
Schiemann reaction
tetrafluoroborate
Halex process
electron-withdrawing groups
2-fluoronitrobenzene
2-nitrochlorobenzene
Friedel-Crafts halogenation
Lewis acids
iron(III) chloride
chlorobenzene
dichlorobenzene
toluene
free radical
bromine test

oxychlorination
Gatterman reaction
diazonium salts
tetrabromophthalic anhydride
decabromodiphenyl ether
tetrabromobisphenol-A
flame retardants
phenols
Phthalic anhydride

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