Abstract
In the title compound, [Cr(C16H16O2)(CO)3], the Cr0 atom of the Cr(CO)3 unit is coordinated to the phenyl ring of the flavan ligand in an η6 mode, with a normal arene-to-metal distance. The Cr(CO)3 unit exhibits a three-legged piano-stool conformation, while the dihydropyran ring displays a distorted envelope configuration. The phenyl ring is twisted away from the fused ring system by 25.5 (2)°. The methoxy group is almost coplanar with the phenyl ring [CMe—O—Car—Car torsion angle = 8.46 (2)°]. The crystal packing is stabilized by intermolecular C—H⋯O interactions.
Highlights
In the title compound, [Cr(C16H16O2)(CO)3], the Cr0 atom of the Cr(CO)3 unit is coordinated to the phenyl ring of the flavan ligand in an 6 mode, with a normal arene-to-metal distance
The methoxy group is almost coplanar with the phenyl ring [CMe—O—Car—Car torsion angle = 8.46 (2)]
Symmetry codes: (i) −x, y−1/2, −z+1/2; (ii) x, −y−1/2, z+1/2; (iii) −x+1, y+1/2, −z+1/2
Summary
Key indicators: single-crystal X-ray study; T = 100 K; mean (C–C) = 0.002 A; R factor = 0.034; wR factor = 0.090; data-to-parameter ratio = 18.3. In the title compound, [Cr(C16H16O2)(CO)3], the Cr0 atom of the Cr(CO) unit is coordinated to the phenyl ring of the flavan ligand in an 6 mode, with a normal arene-to-metal distance. The Cr(CO) unit exhibits a three-legged piano-stool conformation, while the dihydropyran ring displays a distorted envelope configuration. The methoxy group is almost coplanar with the phenyl ring [CMe—O—Car—Car torsion angle = 8.46 (2)]. For the synthesis of the title compound, see: Muller et al (1999) and for the sythesis of 7-methoxyflavan-4-one, see: Sato et al (2006). Crystal data [Cr(C16H16O2)(CO)3] Mr = 376.32 Monoclinic, P21=c a = 9.7703 (5) Ab = 19.1820 (9) Ac = 8.8049 (4) A
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