Chemistry of organosilicon compounds. 167. 3, 4, 7, 8-Tetrasilacycloocta-1, 5-diyne, 3, 6, 7-trisilacyclohepta-1, 4-diyne and related compounds. New class of cyclic …

H Sakurai, Y Nakadaira, A Hosomi…

Index: Sakurai,H.; Nakadaira,Y.; Hosomi,A. Journal of the American Chemical Society, 1983 , vol. 105, p. 3359

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Citation Number: 51

Abstract

Figure 2. Molecular structure of 1:(a) ORTEP view with appropriate data of bond lengths and angles;(b) side view. shift in the UV spectra for 1 and 3. Thus, 1 shows an absorption maximum at 250 nm (c 13,400). Two major factors, Le., ring strain and UT conjugation, may be considered to account for the UV shift. However, judging from I3C NMR data of acetylene units, the ring strain of 1 is not very significant; Le., only a 2.55 ppm shift is observed for ...