Abstract2, 2‐Dichloro‐1, 3‐bis(trimethylsilyl)‐1, 3, 2‐diazastanna‐[3]ferrocenophane (6) was prepared for the first time, characterized in solution by 1H, 13C, 15N, 29Si and 119Sn NMR spectroscopy, and in the solid state by X‐ray structural analysis. The cyclopentadienyl rings are almost parallel and the atoms Fe, C(1), N, Sn form a plane. For comparison, the synthesis of another cyclic bis(amino)tin dichloride (2) with the 1, 3, 2, 4, 5‐diazastannadisila‐cyclopentane ring was repeated, and the molecular structure of 2 was determined by X‐ray crystallography. The five‐membered heterocycle is almost planar, and most structural parameters of 2 compare favorably with those of 6. In contrast to the ferrocenophane 6, the heterocycle 2 is well soluble and stable in solution. Thus, it proved possible to carry out a number of non‐routine 1D and 2D heteronuclear double resonance experiments for 2 in order to determine the absolute signs of the coupling constants 1J(119Sn, 15N) (> 0), 2J(119Sn, 29Si) (> 0), 2, 3J(119Sn, 13C) (n = 2; > 0; n = 3: < 0) and 4J(119Sn, 1H) (119Sn‐N‐C‐C‐1H: < 0; 119Sn‐N‐Si‐C‐1H: > 0) in this type of compound for the first time.
摘要 首次制备了 2,2-二氯-1,3-双(三甲基硅基)-1,3,2-二氮杂-[3]二茂铁(6),并通过 1H、13C、15N、29Si 和 119Sn NMR 光谱分析和 X 射线结构分析确定了其溶液特征和固态特征。环戊二烯环几乎平行,Fe、C(1)、N、Sn 原子形成一个平面。为了进行比较,我们重复合成了另一种具有 1,3,2,4,5-二氮杂锡二甲环戊二烯环的环状双(氨基)二氯化锡(2),并通过 X 射线晶体学确定了 2 的分子结构。与二茂铁 6 相比,杂环 2 在溶液中溶解性好且稳定。因此,事实证明可以对 2 进行一系列非例行的一维和二维异核双共振实验,以确定耦合常数 1J(119Sn,15N)(> 0)、2J(119Sn,29Si)(> 0)、2、3J(119Sn,13C)(n = 2;> 0;n = 3:0) 和 4J(119Sn, 1H) (119Sn-N-C-C-1H: < 0; 119Sn-N-Si-C-1H: >0)。