In:
Collection of Czechoslovak Chemical Communications, Institute of Organic Chemistry & Biochemistry, Vol. 64, No. 6 ( 1999), p. 1013-1027
Abstract:
Three new, substituted, nido carboranes, 7,8-Ph 2 -10-(SMe 2 )-7,8- nido -C 2 B 9 H 10 ( 1a ), 7,8-Ph 2 -10- (SMeEt)-7,8- nido -C 2 B 9 H 10 ( 1b ) and 7,8-Ph 2 -10-(SEt 2 )-7,8- nido -C 2 B 9 H 10 ( 1c ) have been synthesised and characterised, including a crystallographic study of the first. Deprotonation of 1a followed by treatment with (MeCN) 2 (CO) 2 MoBr(η-C 3 H 5 ) at 0 °C affords the non-icosahedral 1,2-Ph 2 -4-(SMe 2 )-5-(η-C 3 H 5 )-5,5-(CO) 2 -5,1,2- closo -MoC 2 B 9 H 8 ( 2a ), which on subsequent warming transforms into icosahedral 2,8-Ph 2 -5-(SMe 2 )-1-(η-C 3 H 5 )-1,1-(CO) 2 -1,2,8- closo - MoC 2 B 9 H 8 ( 3a ). It is argued that under the conditions of these rearrangements the B-S bond is likely to remain intact, and consequently that the identity of the SMe 2 -labelled boron atom in 3a affords useful experimental information on the course of the isomerisation.
Type of Medium:
Online Resource
ISSN:
0010-0765
,
1212-6950
DOI:
10.1135/cccc19991013
Language:
English
Publisher:
Institute of Organic Chemistry & Biochemistry
Publication Date:
1999
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