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The Diels-Alder reaction of bis(diphenylphosphine oxide)butadiyne (BDPPOB) with spiro[2.4]hepta-4,6-diene affords the title compound, 2-(diphenylphosphine oxide)-3-(diphen- ylphosphine oxide ethynyl)spiro[bicyclo[2.2.1] hepta-2,5-diene-7,1-cyclopropane] (DDSHC, C35H28O2P2, Mr = 542). Its crystal structure belongs to monoclinic system, space group P21/n with a =12.708(3), b = 14.666(4), c = 15.048(4) ? = 93.903(5) ? V = 2798.1(13) ?, Z = 4, Dc = 1.288g/cm3, F(000)=1136, (MoK? = 0.187mm-1, final R = 0.0626 and wR= 0.1422 for 4685 independent reflections with I > 2(I). Structural analyses reveal that the title compound is nonplanar and the dihedral angles between two phenyl rings around each phosphorus atom are 71.7(2) and 70.7(3)? respectively.
The Diels-Alder reaction of bis (diphenylphosphine oxide) butadiyne (BDPPOB) with spiro [2.4] hepta-4,6-diene affords the title compound, 2- (diphenylphosphine oxide) -3- (diphen- ylphosphine oxide ethynyl) spiro [ bicyclo [2.2.1] hepta-2,5-diene-7,1-cyclopropane] (DDSHC, C35H28O2P2, Mr = 542). Its crystal structure belongs to monoclinic system, space group P21 / n with a = , b = 14.666 (4), c = 15.048 (4)? = 93.903 (5)? V = 2798.1 (13) ?, Z = 4, Dc = 1.288g / cm3, F (000) = 1136, = 0.187mm-1, final R = 0.0626 and wR = 0.1422 for 4685 independent reflections with I> 2 (I). Structural analyzes reveal that the title compound is nonplanar and the dihedral angles between two phenyl rings around each phosphorus atom are 71.7 ( 2) and 70.7 (3)? Respectively.