Cage-fluorination during deboronation of meta-carboranes

被引：29

作者：

Fox, MA ^{[1
]}

Wade, K ^{[1
]}

机构：

[1] UNIV DURHAM,DEPT CHEM,DURHAM DH1 3LE,ENGLAND

来源：

POLYHEDRON | 1997年 / 16卷 / 14期

关键词：

carborane; deboronation; fluorination; fluoride ion; multinuclear NMR; rearrangement;

D O I：

10.1016/S0277-5387(96)00520-7

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Reactions of the meta carboranes 1,7-RR'-1,7-C2B10H10 (R, R' = Me; R = Ph, R' = Me; R, R' = Ph; R, R' = 4-FC6H4) with tetrabutylammonium fluoride hydrate (TBAFH) in refluxing tetrahydrofuran gave the corresponding nido-7,9-RR'-7,9-C2B9H10- salts, The aryl carboranes and TBAFH also yielded salts of the B-fluorinated anions 10-F-7,9-RR'-7,9-C2B9H9- and 3-F-7,9-RR'-7,9-C2B9H9-. The reaction of 1,7-(4-FC6H4)(2)-1,7-C2B10H10 with TBAFH monitored by F-19 NMR showed cage fluorination occurred during deboronation to give 10-F-7,9-(4-FC6H4)(2)-7,9-C2B9H9-. The latter anion rearranged spontaneously to 3-F-7,9-(4-FC6H4)(2)-7,9-C2B9H9- under the reaction conditions. The B-11, C-13, H-1 and F-19 NMR spectra of the carboranes have been assigned. (C) 1997 Published by Elsevier Science Ltd.

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页码：2517 / 2525

页数：9

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