Influence of Intermolecular Interactions on the Mössbauer Quadrupole Splitting of Organotin(IV) Compounds as Studied by DFT Calculations
作者:Szilvia Kárpáti、Roland Szalay、Attila G. Császár、Károly Süvegh、Sándor Nagy
DOI:10.1021/jp075628b
日期:2007.12.1
influence of intermolecular interactions on the Mossbauer quadrupole splitting (Delta) of 119Sn was investigated in detail by density functional theory (DFT) calculations. Six organotin(IV) complexes [Me2Sn(acac)2 (1), Ph3SnCl (2), Me3Sn-succinimide (3), Me3Sn-phthalimide (4), Me3SnCl (5), and cHex3SnCl (6)] of known solid-state structures and quadrupole splittings were selected. Theoretical Delta values were
通过密度泛函理论(DFT)计算,详细研究了分子间相互作用对119Sn的Mossbauer四极分裂(Delta)的影响。已知固体的六种有机锡(IV)配合物[Me2Sn(acac)2(1),Ph3SnCl(2),Me3Sn-琥珀酰亚胺(3),Me3Sn-邻苯二甲酰亚胺(4),Me3SnCl(5)和cHex3SnCl(6)]选择了状态结构和四极分裂。针对完全优化的几何形状和不同尺寸的实验固态结构,计算了理论Delta值,并将结果与实验Delta值进行了比较。与文献中描述的化合物4的合成方法相比,此处报道了更方便的合成方法。该化合物的实验Delta也已在80 K下重新确定。对于固态中分子间相互作用可忽略不计的化合物,计算得出的Delta值变化不大。相反,计算出的Δ值对晶体晶格中考虑的超分子部分的尺寸非常敏感。化合物2的晶体结构没有明显的分子间相互作用。但是,即使考虑的超分子部分被扩展,计算的D