Title

2,9,16,23-Tetra-kis(1-methyl-eth-yl)-5,6,11,12,13,14,19,20,25,26,27,28-dodecadehydro-tetra-benzo[a,e,k,o]cyclo-eicosene

Document Type

Article

Publication Date

12-1-2011

Abstract

The title compound, C(48)H(40), is a tetra-isopropyl-substituted polyannulenoenyne. The unsubstituted polyannulenoenyne, C(36)H(16) (CSD: RICVEE; CAS: 186494-87-1), has quasi-D(2) (222) symmetry, as determined by least-squares fit (excluding H atoms) to a model optimized in D(2) symmetry by mol-ecular mechanics (r.m.s. deviation = 0.239 Å). The least-squares fits of 36 common C atoms of the title compound (at 90 K) to the parent (at 295 K) and to the optimized model show r.m.s. deviations of 0.419 and 0.426 Å, respectively.

Publication Source (Journal or Book title)

Acta crystallographica. Section E, Structure reports online

First Page

o3493

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