Blocked Rotation in Hexaisopropylbenzene. Evidence for Cyclobutatidene Intermediates in the Trimerization of Diisopropylacetylene by dicobalt Octacarbonyl

EM Arnett, JM Bollinger

Index: Arnett,E.M.; Bollinger,J.M. Journal of the American Chemical Society, 1964 , vol. 86, p. 4729 - 4731

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Citation Number: 40

Abstract

Fig. 1.--Molecular structure of BjHsI: bond distancesare B:,--I= 2.20* 0.03, B,-Bb= 1.71* 0.05, Bb-Bb= 1.84* 0.05. i.; bond angles are LBb-Ba-Bb'= 65.0= t 1.5', i IB $,-B),= 130 5* 1.5", and LBb-I-Bb= 30.0 f 1.0'. The listed errors are estimated errors. error the molecule nearly possesses a four-fold axis. The boron (apical)-boron (basal) average bond distan2e is 1.71 A. with values ranging from 1.70 to 1.72 A. The boron (basal)-boron (basal) average bond ...

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