The compounds Sn(CH2CH2CO2Me)2(C3S5)1(R = Me or Pri) and [Q][Sn(CH2CH2CO2Me)(C3S5)2]2(Q = NEt4 or 1,4-dimethylpyridinium; C3S5= 4,5-disulfanyl-1,3-dithiole-2-thionate) have been prepared and characterised by solution and solid-state NMR spectroscopy. A crystal structure determination of 1(R = Me) revealed it to be a monomeric six-co-ordinate, distorted-octahedral complex with chelating MeO2CCH2CH2 groups and trans-carbon atoms [Sn–O(C) 2.629(7)Å]. The MeO2CCH2CH2 group in 2, both in solution and in the crystal, is monodentate: the tin centres in the anions of both complexes 2 were shown to have structures closer to rectangular pyramids than to trigonal bipyramids. There were, however, slight differences in the solid-state structures of the anions, particularly in regard to the separations of the Sn and carbonyl oxygen atoms; Sn ⋯ O intramolecular distances are 4.84(1) and 3.371(4)Å in 2(Q = NEt4) and 2(Q = 1,4-dimethylpyridinium) respectively. There were also differences in the packing of the anions.
我们制备了 Sn(CH2CH2CO2Me)2(
C3S5)1(R = Me 或 Pri)和 [Q][Sn(CH2CH2CO2Me)( )2]2(Q = NEt4 或 1,4-二
甲基吡啶鎓; = 4,5-二
硫代-1,3-二
硫杂
环戊烯-2-
硫酸盐)化合物,并通过溶液和固态核磁共振光谱对其进行了表征。对 1(R = Me)晶体结构的测定表明,它是一种单体六配位、扭曲八面体配合物,具有螯合 MeO2CCH2CH2 基团和反式碳原子[Sn-O(C) 2.629(7)埃]。2 中的 MeO2CCH2CH2 基团在溶液和晶体中都是单价的:两种络合物 2 阴离子中的
锡中心的结构都更接近于矩形
金字塔,而不是三叉双
金字塔。不过,阴离子的固态结构略有不同,特别是在
锡氧原子和羰基氧原子的间隔方面;在 2(Q = NEt4)和 2(Q = 1,4-二
甲基吡啶)中,
锡⋯氧原子的分子内距离分别为 4.84(1) Å 和 3.371(4)Å 。阴离子的堆积也存在差异。