In the phosphoric triamidesN,N,N′,N′-tetrabenzyl-N′′-(2-chloro-2,2-difluoroacetyl)phosphoric triamide, C30H29ClF2N3O2P, (I),N,N,N′,N′-tetrabenzyl-N′′-(3-fluorobenzoyl)phosphoric triamide, C35H33FN3O2P, (II), andN,N,N′,N′-tetrabenzyl-N′′-(3,5-difluorobenzoyl)phosphoric triamide, C35H32F2N3O2P, (III), the tertiary N atoms of the dibenzylamido groups havesp2character with minimal deviation from planarity. The sums of the three bond angles about the N atoms in (I)–(III) deviate by less than 8° from the planar value of 360°. The geometries of the tertiary N atoms in all phosphoric triamides with C(O)NHP(O)[N]2skeletons deposited in the Cambridge Structural Database [CSD; Allen (2002).Acta Cryst.B58, 380–388] have been examined and the bond-angle sums at the two tertiary N atoms (SUM1 and SUM2) and the parameter ΔSUM (= SUM1 − SUM2) considered. It was found that in compounds with a considerable ΔSUM value, the more pyramidal N atoms are usually oriented so that the corresponding lone electron pair isantiwith respect to the P=O group. In (I), (II) and (III), the phosphoryl and carbonyl groups, separated by an N atom, areantiwith respect to each other. In the C(O)NHP(O) fragment of (I)–(III), the P—N bond is longer and the O—P—N angle is contracted compared with the other two P—N bonds and the O—P—N angles in the molecules. These effects are also seen in analogous compounds deposited in the CSD. Compounds with [C(O)NH]P(O)[N]X(X≠ N), such as compounds with a [C(O)NH]P(O)[N][O] skeleton, have not been considered here. Also, compounds with a [C(O)NH]2P(O)[N] fragment have not been reported to date. In the crystal structures of all three title compounds, adjacent molecules are linkedviapairs of P=O...H—N hydrogen bonds, forming dimers withCisymmetry.
在磷酸三酰胺N,N,N′,N′-四苄基-N′′-(2-氯-2,2-二氟乙酰基)磷酸三酰胺中、(I)、N,N,N′,N′-四苄基-N′′-(3-氟苯甲酰基)磷酸三酰胺,C35H33FN3O2P、(II)和 N,N,N′,N′-四苄基-N′′-(3,5-二氟苯甲酰基)磷酸三酰胺 C35H32F2N3O2P,(III),二苄基氨基的三级 N 原子的平面偏离最小。(I)-(III)中关于 N 原子的三个键角之和与 360°的平面值偏差小于 8°。对剑桥结构数据库[CSD; Allen (2002).Acta Cryst.B58, 380-388]中所有具有 C(O)NHP(O)[N]2 骨架的磷酸三酰胺中三级 N 原子的几何形状进行了研究,并考虑了两个三级 N 原子(SUM1 和 SUM2)上的键角总和以及参数 ΔSUM (= SUM1 - SUM2)。研究发现,在具有较大 ΔSUM 值的化合物中,较多金字塔形 N 原子的取向通常使相应的孤电子对与 P=O 基团成反方向。在(I)、(II)和(III)中,被一个 N 原子隔开的磷酰基和羰基相互反向。在(I)-(III)的 C(O)NHP(O)片段中,与分子中的其他两个 P-N 键和 O-P-N 角相比,P-N 键较长,O-P-N 角收缩。这些效应在沉积在 CSD 中的类似化合物中也可以看到。这里没有考虑[C(O)NH]P(O)[N]X(X≠N)的化合物,例如具有[C(O)NH]P(O)[N][O]骨架的化合物。此外,含有 [C(O)NH]2P(O)[N] 片段的化合物至今也未见报道。在所有这三种标题化合物的晶体结构中,相邻分子都以 P=O...H-N 氢键成对连接,形成具有对称性的二聚体。