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Tris[3,5-bis-(trifluoro-meth-yl)phen-yl]phosphine oxide.

ABSTRACT: In the title compound, C(24)H(9)F(18)OP, an intra-molecular C-H?O short contact generates a five-membered ring, producing an S(5) ring motif. The dihedral angles between the benzene rings are 57.68?(10), 77.80?(11) and 79.48?(10)°. Each of the six trifluoro-methyl substituents shows rotational disorder over two positions with refined site-occupany ratios of 0.64?(3)/0.36?(3), 0.649?(14)/0.351?(14), 0.52?(2)/0.48?(2), 0.545?(16)/0.455?(16), 0.774?(9)/0.226?(9) and 0.63?(5)/0.37?(5). The crystal structure is stabilized by inter-molecular C-H?O and C-H?F inter-actions.

SUBMITTER: Shawkataly OB

PROVIDER: S-EPMC2977759 | biostudies-literature | 2009 Apr

REPOSITORIES: biostudies-literature

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Tris[3,5-bis-(trifluoro-meth-yl)phen-yl]phosphine oxide.

Shawkataly Omar Bin OB Pankhi Mohd Aslam A MA Mohamed-Ibrahim Mohamed Ismail MI Hamdan M Razak MR Fun Hoong-Kun HK

Acta crystallographica. Section E, Structure reports online 20090422 Pt 5

In the title compound, C(24)H(9)F(18)OP, an intra-molecular C-H⋯O short contact generates a five-membered ring, producing an S(5) ring motif. The dihedral angles between the benzene rings are 57.68 (10), 77.80 (11) and 79.48 (10)°. Each of the six trifluoro-methyl substituents shows rotational disorder over two positions with refined site-occupany ratios of 0.64 (3)/0.36 (3), 0.649 (14)/0.351 (14), 0.52 (2)/0.48 (2), 0.545 (16)/0.455 (16), 0.774 (9)/0.226 (9) and 0.63 (5)/0.37 (5). The crystal s ...[more]

PMID: 21583895

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