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Comparison of the crystallographically determined resonance hybrids of 2,5-bispyrrolidino- and 2,5-bispiperidino 1,4-benzoquinones

Giles, R.G.F., Nassimbeni, L.R. and van Niekerk, J.C. (1979) Comparison of the crystallographically determined resonance hybrids of 2,5-bispyrrolidino- and 2,5-bispiperidino 1,4-benzoquinones. South African Journal of Chemistry, 32 (3). pp. 107-110.

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Abstract

The crystal structures of the two title compounds have been determined and compared. Thecrystallographic data correlate very well with an earlier contention that in solution the pyrrolidino-quinone (5) exhibits a greater contribution to its structure from the quadrupolar form (II) than does the piperidino-quinone (6). Both compounds crystallize in the triclinic space group Ρ Τ and have one centrosymmetric molecule per unit cell. The pyrrolidino-quinone unit cell dimensions are a =4,925(3), b =6,533(4), c~ 10,002(5) A, α = 90,8(2), β= 104,3(2), and y = 93,8(2)°, and those for the piperidino-quinone are a=8,437(5),£>=6,658(4), C- 6,839(4) A, a=99,6(2), β = 108,4(2), and γ = 86,7(2)°.

Publication Type: Journal Article
Publisher: South African Bureau for Scientific Publications
Copyright: © 1979 South African Chemical Institute (SACI)
URI: http://researchrepository.murdoch.edu.au/id/eprint/35600
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