Research Article: rac-2,2′-Bis(diphenyl­phosphan­yl)-1,1′-binaphth­yl: a racemic diphosphine ligand

Date Published: July 01, 2012

Publisher: International Union of Crystallography

Author(s): Feng Niu, Wenxiang Chai, Li Song, Mengbo Zhou, Jiaping Liang.


The asymmetric unit of the title compound, C44H32P2, conventionally abbreviated BINAP, is one half of the complete chiral BINAP mol­ecule, which adopts a C2 crystallographic point-group symmetry with a twofold axis splitting the mol­ecule in two identical halves; a center of symmetry between mol­ecules further determines the racemic pairs. There are no obvious supra­molecular inter­actions between adjacent BINAP mol­ecules.

Partial Text

For applications of triaryl­phosphine ligands in various catalytic reactions, see: Doherty et al. (2012 ▶); Uemura et al. (2012 ▶); Onodera et al. (2012 ▶); Lin et al. (2012 ▶). For applications of 2,2′-bis­(diphenyl­phosphan­yl)-1,1′-binaphthyl (BINAP) as a chiral catalyst in various asymmetric catalysed reactions, see: Kojima & Mikami (2012 ▶); Aikawa et al. (2011 ▶); Ge & Hartwig (2011 ▶); Moran et al. (2011 ▶). For similar diphosphine ligands, see: Kassube et al. (2008 ▶); Fawcett et al. (2005 ▶); Wu et al. (2004 ▶). For the related crystal structure of the (S)-enanti­omer (S)-(−)-2,2′-bis­(diphenyl­phosphan­yl)-1,1′-binaphthyl, see: Jones et al. (2003 ▶).




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