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首页> 外文期刊>Acta Crystallographica, Section B. Structural Science >Short N+-H center dot center dot center dot Ph hydrogen bonds in ammonium tetraphenylborate characterized by neutron diffraction
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Short N+-H center dot center dot center dot Ph hydrogen bonds in ammonium tetraphenylborate characterized by neutron diffraction

机译:四苯硼酸铵中短的N + -H中心点中心点中心点Ph氢键的特征在于中子衍射

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摘要

The crystal structures of ammonium tetraphenylborate, NH4+. BPh4-, are determined by neutron diffraction at 20 and 243 K. At both temperatures, all four N-H vectors of the ammonium ion an time-average-oriented at the midpoints of the phenyl rings of neighboring anions. The N-H ... Ph distances, H ... M 2.067 and N ... M 3.023 Angstrom, are exceptionally short (M = aromatic midpoint). Even at 20 K the ammonium ion performs large amplitude motions which allow the N-H vectors to sample the entire face of the aromatic system. [References: 32]
机译:四苯基硼酸铵NH4 +的晶体结构。 BPh4-是通过在20和243 K处的中子衍射确定的。在两种温度下,铵离子的所有四个N-H向量均以时间平均的方式位于相邻阴离子的苯环的中点。 N-H ... Ph距离H ... M 2.067和N ... M 3.023埃特别短(M =芳香族中点)。即使在20 K时,铵离子也会执行大幅度的运动,这使N-H向量可以对芳族系统的整个表面进行采样。 [参考:32]

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