Knowledge (XXG)

Trimethyloxonium tetrafluoroborate

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Raber, Douglas J.; Gariano, Jr, Patrick; Brod, Albert O.; Gariano, Anne L.; Guida, Wayne C. (1977). "Esterification of Carboxylic Acids with Trialkyloxonium Salts: Ethyl and Methyl 4-Acetoxybenzoates".
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at −20 °C. Its degradation products are corrosive, although it is considerably less hazardous than methyl triflate or methyl fluorosulfonate, on account of its lack of volatility.
405:. It is a white solid that rapidly decomposes upon exposure to atmospheric moisture, although it is robust enough to be weighed quickly without inert atmosphere protection. 773: 660:
Stang, Peter J.; Hanack, Michael; Subramanian, L. R. (1982). "Perfluoroalkanesulfonic Esters: Methods of Preparation and Applications in Organic Chemistry".
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Trimethyloxonium tetrafluoroborate is generally ranked as the strongest commercially available reagent for electrophilic
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Due to its high reactivity, it is rapidly destroyed by atmospheric moisture and best stored in an inert atmosphere
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of carboxylic acids under conditions where acid-catalyzed reactions are infeasible:
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Except where otherwise noted, data are given for materials in their
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179.6–180 °C (355.3–356.0 °F; 452.8–453.1 K)
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InChI=1S/C3H9O.BF4/c1-4(2)3;2-1(3,4)5/h1-3H3;/q+1;-1
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(It is sometimes called "Meerwein's salt" after 566:Trimethyloxonium tetrafluoroborate is useful for 556:) are stronger sources of electrophilic methyl. 168: 80: 767: 8: 417:The compound is prepared by the reaction of 774: 760: 752: 221: 146: 124: 15: 188: 741:Meerwein's salt classically referred to 608: 604: 600: 596: 592: 588: 584: 580: 576: 540:reagents, and the transiently-generated 531: 527: 504: 500: 496: 492: 488: 475: 471: 467: 463: 459: 455: 451: 447: 443: 439: 435: 380: 376: 372: 301: 297: 293: 734: 621: 267: 242: 217: 807: 782:Salts and covalent derivatives of the 137: 1471: 249:Key: CZVZBKHWOFJNCR-UHFFFAOYSA-N 7: 794: 634:"Trimethyloxonium Tetrafluoroborate" 627: 625: 159: 17:Trimethyloxonium tetrafluoroborate 393:, being a synthetic equivalent of 363:Trimethyloxonium tetrafluoroborate 49:Trimethyloxonium tetrafluoroborate 14: 743:triethyloxonium tetrafluoroborate 407:Triethyloxonium tetrafluoroborate 31: 22: 409:is a closely related compound. 347:(at 25 °C , 100 kPa). 1: 482:The salt hydrolyzes readily: 59:Trimethyloxonium fluoroborate 648:, vol. 6, p. 1019 1627: 1473: 809: 791: 536:, X = Cl, Br, I), methyl 413:Preparation and reactions 389:.) This salt is a strong 341: 278: 258: 233: 64: 54: 44: 39: 30: 21: 718:10.15227/orgsyn.056.0059 632:T. J. Curphey (1988). 522:methyl fluorosulfonate 674:10.1055/s-1982-29711 503:O + MeOH + H[BF 319: g·mol 18: 1596:Tetrafluoroborates 1591:Methylating agents 351:Infobox references 16: 1606:Oxonium compounds 1578: 1577: 1572: 1571: 864: 784:tetrafluoroborate 706:Organic Syntheses 646:Collected Volumes 639:Organic Syntheses 466:] + B[(OCH(CH 419:boron trifluoride 391:methylating agent 369:with the formula 359:Chemical compound 357: 356: 202:CompTox Dashboard 106:Interactive image 1618: 1611:Methyl compounds 862: 795: 776: 769: 762: 753: 746: 739: 722: 721: 700: 694: 693: 657: 651: 649: 642: 629: 611: 555: 554: 553: 550: 535: 508: 478: 404: 403: 402: 399: 384: 367:organic compound 318: 305: 286:Chemical formula 270:F(F)(F)F.(C)(C)C 226: 225: 210: 208: 192: 172: 161: 150: 139: 128: 108: 84: 35: 26: 19: 1626: 1625: 1621: 1620: 1619: 1617: 1616: 1615: 1581: 1580: 1579: 1574: 1573: 1395: 1391: 1383: 1375: 1371: 1360: 1356: 1324: 1320: 1312: 1299: 1295: 1281: 1277: 1269: 1265: 1257: 1253: 1245: 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solid 65:Identifiers 55:Other names 538:carboranate 514:methylation 324:Appearance 279:Properties 144:100.006.360 1601:Oxycations 1585:Categories 616:References 530:X][SbF 312:Molar mass 190:BFC3NMU8S8 117:ChemSpider 93:3D model ( 72:CAS Number 46:IUPAC name 682:0039-7881 662:Synthesis 607:O + HBF 579:H + (CH 491:O][BF 462:O][BF 438:O·BF 379:O][BF 300:O][BF 690:94894040 561:glovebox 544:cation ( 371:[(CH 292:[(CH 82:420-37-1 1474:  591:→ RCO 526:[Me 487:[Me 446:O + 3 C 365:is the 306: 170:2735153 157:PubChem 126:2016863 1031:FeO(BF 712:: 59. 688:  680:  599:+ (CH 499:O → Me 442:+ 2 Me 317:147.91 263:SMILES 40:Names 1388:Pb(BF 1368:Hg(BF 1353:Pt(BF 1317:Ba(BF 1274:Sn(BF 1262:In(BF 1250:Cd(BF 1137:Sr(BF 1097:Zn(BF 1085:Cu(BF 1062:Ni(BF 1050:Co(BF 1020:Fe(BF 1008:Mn(BF 962:Ca(BF 922:Mg(BF 729:Notes 686:S2CID 495:] + H 470:Cl)CH 421:with 238:InChI 95:JSmol 1380:TlBF 1309:CsBF 1292:(IPy 1242:AgBF 1129:RbBF 914:NaBF 873:NOBF 863:TEDA 818:LiBF 678:ISSN 666:1982 520:and 474:OMe] 434:4 Me 425:and 181:UNII 1568:No 1565:Md 1562:Fm 1559:Es 1556:Cf 1553:Bk 1550:Cm 1547:Am 1544:Pu 1541:Np 1535:Pa 1532:Th 1529:Ac 1526:** 1521:Yb 1518:Tm 1515:Er 1512:Ho 1509:Dy 1506:Tb 1503:Gd 1500:Eu 1497:Sm 1494:Pm 1491:Nd 1488:Pr 1485:Ce 1482:La 1467:Og 1464:Ts 1461:Lv 1458:Mc 1455:Fl 1452:Nh 1449:Cn 1446:Rg 1443:Ds 1440:Mt 1437:Hs 1434:Bh 1431:Sg 1428:Db 1425:Rf 1422:Lr 1419:** 1416:Ra 1413:Fr 1408:Rn 1405:At 1402:Po 1399:Bi 1364:Au 1349:Ir 1346:Os 1343:Re 1337:Ta 1334:Hf 1331:Lu 1303:Xe 1296:)BF 1288:Te 1285:Sb 1230:(BF 1218:(BF 1207:(BF 1195:(BF 1183:(BF 1171:(BF 1160:(BF 1156:Nb 1153:Zr 1123:Kr 1120:Br 1117:Se 1114:As 1111:Ge 1108:Ga 1073:(BF 996:(BF 985:(BF 978:Ti 975:Sc 954:KBF 948:Ar 945:Cl 936:Si 933:Al 908:Ne 865:)BF 825:Be 812:He 799:HBF 786:ion 714:doi 670:doi 587:OBF 575:RCO 546:MeN 454:OCH 207:EPA 160:CID 1587:: 1538:U 1479:* 1340:W 1328:* 1150:Y 1042:BF 981:V 942:S 939:P 905:F 902:O 895:BF 891:NH 884:BF 880:NO 854:BF 847:BF 840:BF 828:B 710:56 708:. 684:. 676:. 664:. 643:; 636:. 624:^ 595:CH 429:: 395:CH 1394:2 1392:) 1390:4 1382:4 1374:2 1372:) 1370:4 1359:2 1357:) 1355:4 1323:2 1321:) 1319:4 1311:4 1298:4 1294:2 1280:2 1278:) 1276:4 1268:3 1266:) 1264:4 1256:2 1254:) 1252:4 1244:4 1236:2 1234:) 1232:4 1224:4 1222:) 1220:4 1213:3 1211:) 1209:4 1201:2 1199:) 1197:4 1189:4 1187:) 1185:4 1177:4 1175:) 1173:4 1166:4 1164:) 1162:4 1143:2 1141:) 1139:4 1131:4 1103:2 1101:) 1099:4 1091:2 1089:) 1087:4 1079:2 1077:) 1075:4 1068:2 1066:) 1064:4 1056:2 1054:) 1052:4 1044:4 1037:2 1035:) 1033:4 1026:2 1024:) 1022:4 1014:2 1012:) 1010:4 1002:2 1000:) 998:4 991:3 989:) 987:4 968:2 966:) 964:4 956:4 928:2 926:) 924:4 916:4 897:4 893:4 886:4 882:2 875:4 867:4 861:( 856:4 849:4 842:4 838:7 836:H 834:7 832:C 820:4 801:4 775:e 768:t 761:v 720:. 716:: 692:. 672:: 650:. 609:4 605:2 603:) 601:3 597:3 593:2 589:4 585:3 583:) 581:3 577:2 552:2 549:+ 534:] 532:6 528:2 507:] 505:4 501:2 497:2 493:4 489:3 476:3 472:2 468:2 464:4 460:3 456:2 452:3 450:H 448:2 444:2 440:3 436:2 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Index

Structural formula of trimethyloxonium tetrafluoroborate
Ball-and-stick models of the component ions of trimethyloxonium tetrafluoroborate
IUPAC name
CAS Number
420-37-1
JSmol
Interactive image
ChemSpider
2016863
ECHA InfoCard
100.006.360
Edit this at Wikidata
PubChem
2735153
UNII
BFC3NMU8S8
CompTox Dashboard
DTXSID20883377
Edit this at Wikidata
InChI
SMILES
Chemical formula
Molar mass
Melting point
standard state
Infobox references
organic compound
Hans Meerwein
methylating agent
Triethyloxonium tetrafluoroborate

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