Crystals of hexaphenoxycyclotriphosphazene, [NP(OPh)₂]₃, are monoclinic, a= 11·176(4), b= 19·270(3), c= 16·171 (4)Å, β= 92·07(2)°, Z= 4, space group P2₁/n. The structure was determined with diffractometer data by Patterson and electron-density methods, and refined by block-diagonal least-squares methods to R 0·037 for 2899 observed reflexions. The cyclotriphosphazene ring is slightly non-planar, with two nitrogen atoms displaced by 0·15 Å in opposite directions from the plane of the other four (three phosphorus and one nitrogen) atoms. The conformations of the phenoxy-groups are different at the three phosphorus atoms, and there are small deviations among chemically equivalent angles; these differences are probably a result of intra- and inter-molecular steric effects. There are no differences among chemically equivalent bond lengths, the mean distances being P–N 1·575(2), P–O 1·582(2), and O–C 1·406(3)Å.

中文翻译：

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六苯氧基环三磷腈[NP（OPh）₂ ] _3的晶体和分子结构

六苯氧基环三磷腈[NP（OPh）₂ ] ₃的晶体为单斜晶，a = 11·176（4），b = 19·270（3），c = 16·171（4）Å，β= 92·07（ 2）°，Z = 4，空间群P 2 ₁ / n。通过衍射仪数据通过Patterson和电子密度方法确定结构，并通过块对角最小二乘法将其精炼为R对于2899观察到的反射，为0·037。环三磷腈环略为非平面，其中两个氮原子与其他四个（三个磷和一个氮）原子的平面方向相反，方向​​偏移0·15Å。在三个磷原子上，苯氧基的构象不同，化学当量角之间的偏差也很小。这些差异可能是分子内和分子间空间效应的结果。化学等效键长之间没有差异，平均距离为P–N 1·575（2），P–O 1·582（2）和O–C 1·406（3）Å。