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Crystal data on ortho ‐substituted benzaldehydes
Author(s) -
Baiwir M.,
Llabres G.,
Piette J.L.
Publication year - 1975
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s0021889875010801
Subject(s) - chemistry , molecule , crystallography , work (physics) , crystal (programming language) , neutron diffraction , crystal structure , organic chemistry , thermodynamics , physics , computer science , programming language
Unlike the position with negatively charged substituents, little has been done on benzaldehydes ortho ‐substituted with positively charged groups. This is more especially true in the field of crystallography where only the X‐ray and neutron diffraction study of o ‐nitrobenzaldehyde has been reported [Coppens & Schmidt, Acta Cryst . (1964). 17 , 222–228; Coppens, Acta Cryst . (1964). 17 , 573–578]. Preliminary results of a structural investigation on Se‐ and Te‐containing benzaldehydes are presented. The main purpose is to corroborate and to complete the conclusion of recent n.m.r. work on the conformation of these molecules [Baiwir, Llabres, Denoel & Piette, Mol. Phys . (1973). 25 , 1–7]. The following compounds have been studied: C 6 H 4 .COH.TeCl, C 6 H 4 .COH.TeBr, C 6 H 4 .COH.TeI, C 6 H 4 COH.SeCl, C 6 H 4 .COH.SeBr. The crystal structure of the second (TeBr) has been recently reported [Baiwir Llabres, Dideberg, Dupont & Piette, Acta Cryst . (1974). B 30 , 139–143] and the structure of the last (SeBr) is presently in the final stage of refinement.