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Preparation and characterisation of 9,10‐dihydroanthracene and tert ‐butyl‐9,10‐dihydroanthracene complexes with one or two tricarbonylchromium units; crystal structure of tricarbonyl (η 1,2,3,4,4a,9a ‐9,10‐dihydroanthracene)chromium
Author(s) -
Whitton Alan J.,
Kumberger Otto,
Müller Gerhard,
Schmidbaur Hubert
Publication year - 1990
Publication title -
chemische berichte
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 0009-2940
DOI - 10.1002/cber.19901231002
Subject(s) - chemistry , moiety , crystal structure , stereochemistry , ring (chemistry) , medicinal chemistry , crystallography , organic chemistry
The complexes [9,10‐dihydroanthracene][tricarbonylchromium] n [9,10‐DHA][Cr(CO) 3 ] n [n = 1 ( 1 ), 2 ( 2 )] and the related mono‐ and bis(tricarbonylchromium) complexes of 2,6‐ and 2,7‐di‐ tert ‐butyl‐9,10‐dihydroanthrancene [2,6‐DB‐9,10‐DHA][Cr(CO) 3 ] n [n = 1 ( 3 ), 2 ( 4 )] and [2,7‐DB‐9,10‐DHA][Cr(CO) 3 ] n [n = 1 ( 5 ), 2 ( 6 )] have been prepared by heating the 9,10‐DHA species in the presence of hexacarbonylchromium [Cr(CO) 6 ]. Evidence for the existence of the complex [2,6,9‐tri‐ tert ‐butyl‐9,10‐DHA][Cr(CO) 3 ] ( 7 ) is also presented. The complexes have been characterised spectroscopically, and for complex 1 an X‐ray crystallographic structure determination has been carried out. This complex adopts the unexpected structure in which the non‐coordinated arene ring is bent towards the Cr(CO) 3 moiety. The syntheses and spectroscopic characterisations of 2,6‐ and 2,7‐di‐ tert ‐butylanthracene (2,6‐ and 2,7‐DBA), 2,6‐ and 2,7‐di‐ tert ‐butyl‐9,10‐dihydroanthracene (2,6‐and 2,7‐DB‐9,10‐DHA), 2,6,9‐, 2,7,9‐, and 2,7,10‐tri‐ tert ‐butyl‐9,10‐dihydroanthracene (2,6,9‐, 2,7,9‐ and 2,7,10‐TB‐9,10‐DHA), and 2,6,9,10‐ and 2,7,9,10‐tetra‐ tert ‐butyl‐9,10‐dihydroanthracene(2,6,9,10‐ and 2,7,9,10‐TeB‐9,10‐DHA) are also given.