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Chromium-carbonyl complex geometry

Commencing with alkyl group rotations, there have been two studies of the stereodynamics of chromium carbonyl complexes with 77 -hexaalkylbenzene. For the complex [ Cr(CO)2L 2(/i-N2)] (L = ry -hexaethylbenzene), NMR band-shape changes were attributed to slowed ethyl group rotation with a barrier, AG (300 K), of 46.0 3.0 kJ moP. The ligand hexa-n-propyl-benzene adopts a D3d symmetry with the alkyl substituent alternately up and down with respect to the observer. This geometry is retained in the chromium tricarbonyl complex and a decoalescence phenomenon observed in its NMR spectrum was... [Pg.313]

Copper(I) complexes show a lamellar structure not conclusively assigned [175]. Liquid crystalline complexes with chromium, molybdenum and tungsten as metallic centers have also been reported. The 1,4,7-trisubstituted 1,4,7-triazacyclononane and three carbonyl groups, 80, are coordinated in an octahedral geometry. [Pg.1939]

See other pages where Chromium-carbonyl complex geometry is mentioned: [Pg.143]    [Pg.161]    [Pg.127]    [Pg.161]    [Pg.179]    [Pg.179]    [Pg.294]    [Pg.463]    [Pg.464]    [Pg.26]    [Pg.31]    [Pg.68]    [Pg.647]    [Pg.23]    [Pg.179]    [Pg.123]    [Pg.490]    [Pg.646]    [Pg.9]    [Pg.191]    [Pg.328]    [Pg.210]    [Pg.130]    [Pg.255]   
See also in sourсe #XX -- [ Pg.130 ]



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Carbonyls geometry

Chromium carbonyl complex

Chromium carbonylation

Chromium carbonyls

Complex geometries

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