ePrints@IIScePrints@IISc Home | About | Browse | Latest Additions | Advanced Search | Contact | Help

Thermally induced solid-state Z–E isomerisation in bi(cyclopentenylidene) compounds. X-Ray crystal structure of (Z)$-2,2^\prime-dioxo 3,3^\prime,4,4^\prime,5\alpha,5^\prime \beta-$hexa-phenyl-1,$1^\prime -$bi(cyclopentenylidene)

Vyas, K and Hattikudur, M (1990) Thermally induced solid-state Z–E isomerisation in bi(cyclopentenylidene) compounds. X-Ray crystal structure of (Z)$-2,2^\prime-dioxo 3,3^\prime,4,4^\prime,5\alpha,5^\prime \beta-$hexa-phenyl-1,$1^\prime -$bi(cyclopentenylidene). In: Journal of the Chemical Society, Perkin Transactions 2 (7). pp. 1177-1180.

[img]
Preview
PDF
Thermally_Induced_Solid-state.pdf

Download (440Kb)

Abstract

The crystal and molecular structure of the title compound has been determined; it crystallises as a methanol solvate in the space group $P2_1$/n with a= 11.647(2), b= 18.583(2), c= 16.113(2)$\AA,\beta= 92.11(1)^o$ and Z= 4. The structure has been solved by direct methods and refined to a final R value of 0.090. The molecular structure is different from that proposed earlier on the basis of spectral data. The central bond connecting the two five-membered rings displays pure double-bond character due to lack of conjugation. This is responsible for the thermal stability of the compound and the relatively high temperature for the isomerisation. One of the two five-membered rings assumes an envelope conformation and the other a half-chair. The solvent methanol molecule is disordered.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Royal Society of Chemistry
Department/Centre: Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited: 20 Feb 2008
Last Modified: 19 Sep 2010 04:41
URI: http://eprints.iisc.ernet.in/id/eprint/12671

Actions (login required)

View Item View Item