Investigation of phosphorus–carbon bond lengths in aromatic phosphines. Part I. Crystal and molecular structures of tri-o-tolylphosphine, -phosphine oxide, -phosphine sulphide, and -phosphine selenide
Investigation of phosphorus–carbon bond lengths in aromatic phosphines. Part I. Crystal and molecular structures of tri-o-tolylphosphine, -phosphine oxide, -phosphine sulphide, and -phosphine selenide
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芳香膦中磷碳键长度的研究第一部分:三邻甲苯基膦、氧化膦、硫化膦和硒化膦的晶体和分子结构。
DOI:
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发表时间:
1975
期刊:
影响因子:
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通讯作者:
B. Dahlén
中科院分区:
文献类型:
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作者:
T. Cameron;B. Dahlén
The crystal and molecular structure of the four title compounds from four circle have been determined. Tri-o-tolylphosphine (I), triclinic, a= 12.081(5), b= 10.915(5), c= 14.348(7)A; α= 91.95(5)°, β= 110.58(4)°, γ= 98.22(5)°, space group P, Z= 4; R 0.045, 4 698 independent reflections. Tri-o-tolylphosphine oxide (II), monoclinic, a= 9.039(5), b= 17.282(6), c= 35.192(12)A, β= 95.12(1)° space group P21/c, Z= 12; R 0.075, 5 428 independent reflections. Tri-o-tolylphosphine sulphide (III), triclinic, a= 15.377(4), b= 15.346(4), c= 7.979(4)A; α= 103.1(1)°, β= 86.6(1)°, γ= 96.5(1)°, space group P, Z= 4; R 0.094, 2 890 independent reflections. Tri-o-tolylphosphine selenide (IV), monoclinic, a= 33.497(10), b= 8.004(2), c= 14.701(10)A, β= 110.67(4)°, space group C2/c, Z= 8; R 0.067, 2 343 independent reflections.The differences in P–C bond lengths appear to be determined by charge density on the aromatic group and the phosphorus atom, and by steric hindrance and crystal packing forces, and not by any extension of the π system of the aromatic groups to the phosphorus atom.