In this paper, we argued that the classical explanation to the formation of trigonal planar coordination of the center N and O atoms in N(SiR 3 ) 3 and [O(SiR 3 ) 3 ] + by forming 4-center 2-electron conjugated d-pπ bond was questionable, since it could not correctly predict the configurations of P(SiR 3 ) 3 and [S(SiR 3 ) 3 ] + . We found that the trigonal planar configuration of the center N and O atoms was strongly correlated to the greater difference between the electronic negativities of the center atom N/O, and the around Si atoms. We proposed that repulsive interactions among the three positive charged YR 3 (Y=Si) moieties resulted in the trigonal planar configuration of the center N and O atoms. This proposal was supported by the predicted trigonal planar configurations of model species [F(BH 3 ) 3 ] − and [O(BH 3 ) 3 ] 2− , in which the formation of 4-center 2-electron conjugated d-pπ bond was impossible.

中文翻译：

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对中心N和O原子的三角平面配位形成本质的新看法

在本文中，我们论证了 N(SiR 3 ) 3 和 [O(SiR 3 ) 3 ] + 中中心 N 和 O 原子通过形成 4 中心 2 电子共轭形成三角形平面配位的经典解释。 d-pπ 键是有问题的，因为它不能正确预测 P(SiR 3 ) 3 和 [S(SiR 3 ) 3 ] + 的构型。我们发现中心 N 和 O 原子的三角形平面构型与中心原子 N/O 和周围 Si 原子的电子负性之间的较大差异密切相关。我们提出三个带正电荷的 YR 3 (Y=Si) 部分之间的排斥相互作用导致中心 N 和 O 原子的三角形平面构型。该提议得到模型物种 [F(BH 3 ) 3 ] - 和 [O(BH 3 ) 3 ] 2- 的预测三角平面构型的支持，