Synthesis and study of new binuclear compounds containing bridging (μ-CN)B(C<sub>6</sub>F<sub>5</sub>)<sub>3</sub>and (μ-NC)B(C<sub>6</sub>F<sub>5</sub>)<sub>3</sub>systems
作者:Ino C. Vei、Sofia I. Pascu、Malcolm L. H. Green、Jennifer C. Green、Richard E. Schilling、Grant D. W. Anderson、Leigh H. Rees
DOI:10.1039/b302163g
日期:——
The new compounds [K(18-crown-6)][SCNB(C6F5)3]
(1), [K(18-crown-6)][(C6F5)3B(μ-NC)B(C6F5)3]
(2), [K(18-crown-6)][NCB(C6F5)3]
(3), [Me3Si(μ-NC)B(C6F5)3]
(4) and [Hg(μ-CN)B(C6F5)3}2]
(5) have been synthesised. Reaction between [IrCl(PPh3)2(CO)] and one equivalent of 4 gives [Ir(μ-NC)B(C6F5)3}(PPh3)2CO]
(6). Similarly, the reaction between [Fe(η-C5H5)(CO)2Cl] and 4 gives [Fe(μ-NC)B(C6F5)3}(η-C5H5)(CO)2]
(7a). The NMR-scale reaction between [Fe(η-C5H5)(CO)2CN] and B(C6F5)3 gives the isomer [Fe(μ-CN)B(C6F5)3}(η-C5H5)(CO)2]
(7b). In the compounds 3, 4, 6 and 7a the anion [NCB(C6F5)3]â is coordinated to the metal through the nitrogen. Complexes 1, 2 and 7b incorporate a (μ-CN)B unit. The compounds containing the isomeric bridging (μ-CN)B or (μ-NC)B systems have been investigated by 11B1H} NMR spectroscopy and by DFT calculations. The 11B1H} NMR spectra enable distinction between the isomers. The single-crystal X-ray structures of 1, 3 and 7a have been determined.
新化合物[K(18-冠-6)][SCNB(C6F5)3]
(1), [K(18-冠-6)][(C6F5)3B(μ-NC)B(C6F5)3]
(2), [K(18-冠-6)][NCB(C6F5)3]
(3), [Me3Si(μ-NC)B(C6F5)3]
(4) 和 [Hg(μ-CN)B(C6F5)3}2]
(5) 已被合成。[IrCl(PPh3)2(CO)] 与 4 的反应生成 [Ir(μ-NC)B(C6F5)3}(PPh3)2CO]
(6)。类似地,[Fe(η-C5H5)(CO)2Cl] 与 4 的反应生成 [Fe(μ-NC)B(C6F5)3}(η-C5H5)(CO)2]
(7a)。[Fe(η-C5H5)(CO)2CN] 与 B(C6F5)3 的 NMR 规模反应生成异构体 [Fe(μ-CN)B(C6F5)3}(η-C5H5)(CO)2]
(7b)。在化合物 3, 4, 6 和 7a 中,阴离子 [NCB(C6F5)3]- 通过氮原子与金属配位。复合物 1, 2 和 7b 包含一个 (μ-CN)B 单元。含有异构桥联 (μ-CN)B 或 (μ-NC)B 系统的化合物已通过 11B1H} NMR 光谱学和 DFT 计算进行研究。11B1H} NMR 谱能够区分异构体。1, 3 和 7a 的单晶 X 射线结构已被确定。