Acta Crystallographica Section E

Structure Reports Online

Volume 70, Part 1 (January 2014)


organic compounds



su2665 scheme

Acta Cryst. (2014). E70, o20-o21    [ doi:10.1107/S1600536813032674 ]

1,1'-(Diselanediylbis{[P,P-diphenyl-N-(tri­methyl­sil­yl)phospho­rimido­yl]methanylyl­idene})bis­[1,1-diphenyl-N-(tri­methyl­sil­yl)-[lambda]5-phosphanamine] pentane disolvate

R. Thirumoorthi, T. Chivers and R. S. Laitinen

Abstract: The title compound, C62H78N4P4Se2Si4·2C5H12, is made up of two [SeC(PPh2NSiMe3)(PPh2NHSiMe3)] units related by an inversion center situated at the mid-point of the diselenide bond. It crystallized with two disordered mol­ecules of pentane used as solvent of crystallization. It is a rare example of an anti­periplanar diselenide and exhibits a long Se-Se bond of 2.4717 (8) Å. The Se-C bond length of 1.876 (5) Å is short in comparison with the range of values found for other diselenides (1.91-1.97 Å). The mol­ecule exhibits two intra­molecular N-H...N hydrogen bonds. In the crystal, there are no significant inter­molecular inter­actions present. One of the Me3Si- groups is disordered over two positions with a refined occupancy ratio of 0.708 (8):0.292 (8). The contribution of the disordered solvent to the scattering was removed with the SQUEEZE option of PLATON [Spek (2009). Acta Cryst. D65, 148-155]. The solvent contribution has been included in the reported mol­ecular weight and density.


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