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Racemic tricarbon-yl(?-7-meth-oxy-flavan)chromium(0).

ABSTRACT: IN THE TITLE COMPOUND [SYSTEMATIC NAME: tricarbonyl(?(6)-7-methoxy-2-phenyl-3,4-dihydro-2H-1-benzopyran)chromium(0)], [Cr(C(16)H(16)O(2))(CO)(3)], the Cr(CO)(3) unit is coordinated by the phenyl-ene ring of the flavan ligand, exhibiting a three-legged piano-stool conformation, with a point to plane distance of 1.750?(1)?Å. The phenyl ring is twisted away from the fused ring system by 36.49?(5)° (r.m.s. deviation = 0.027?Å; fitted atoms are the C(6) ring and the attached fused-ring C and O atoms). The dihydro-pyran ring displays a distorted envelope configuration by displacement of the phenyl-bearing and the adjacent ring C atoms from the fused-ring system plane by 0.356?(2) and 0.402?(2)?Å, respectively.

SUBMITTER: van Tonder JH 

PROVIDER: S-EPMC3007425 | biostudies-literature | 2010 Jul

REPOSITORIES: biostudies-literature

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Racemic tricarbon-yl(η-7-meth-oxy-flavan)chromium(0).

van Tonder Johannes H JH   Bezuidenhoudt Barend C B BC   Janse van Rensburg J Marthinus JM  

Acta crystallographica. Section E, Structure reports online 20100710 Pt 8

IN THE TITLE COMPOUND [SYSTEMATIC NAME: tricarbonyl(η(6)-7-methoxy-2-phenyl-3,4-dihydro-2H-1-benzopyran)chromium(0)], [Cr(C(16)H(16)O(2))(CO)(3)], the Cr(CO)(3) unit is coordinated by the phenyl-ene ring of the flavan ligand, exhibiting a three-legged piano-stool conformation, with a point to plane distance of 1.750 (1) Å. The phenyl ring is twisted away from the fused ring system by 36.49 (5)° (r.m.s. deviation = 0.027 Å; fitted atoms are the C(6) ring and the attached fused-ring C and O atoms)  ...[more]

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