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Diphosphinidene-cyclobutene

Structure of [5]-heIiphos obtained by XRD. The structures of the pyroelectric 4,8,12-trioxa-12c-phospha-4,8,12,12c-tetrahydrodibenzo[cd,mn]pyrene (61), of oligo(thioarylene)cyclophosphonites 62, of the Diels-Alder cyclo-adducts 63, 64, and of a rotational isomer of a l,2-diphenyl-3,4-diphosphinidene-cyclobutene (65) have been determined by X-ray crystallographic analysis. [Pg.319]

Corroborating evidence comes from crystal structures reported for 3,4-diphosphinidene-cyclobutene, in which the C(cyclopropyl)-C(cyclopropyl) bonds are longer, and the C(cyclopropyl)-C(P) bonds are shorter than those expected for C=C double and C—C single bonds, respectively. [Pg.56]

Fig. 5.22 Comparison of the structures of 3,4-diphosphinidene-cyclobutene with benzannelated phospholes... Fig. 5.22 Comparison of the structures of 3,4-diphosphinidene-cyclobutene with benzannelated phospholes...
See other pages where Diphosphinidene-cyclobutene is mentioned: [Pg.16]    [Pg.56]    [Pg.56]    [Pg.57]    [Pg.57]    [Pg.16]    [Pg.56]    [Pg.56]    [Pg.57]    [Pg.57]   
See also in sourсe #XX -- [ Pg.13 , Pg.56 , Pg.57 ]



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