首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Synthesis and study of new binuclear compounds containing briding (mu-CN)B(C_6F_5)_3 and (mu-NC)B (C_6F_5)_3 systems
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Synthesis and study of new binuclear compounds containing briding (mu-CN)B(C_6F_5)_3 and (mu-NC)B (C_6F_5)_3 systems

机译:含桥联(mu-CN)B(C_6F_5)_3和(mu-NC)B(C_6F_5)_3系统的新型双核化合物的合成和研究

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摘要

The new compounds [K(18-crown-6)][SCNB(C_6F_5)_3] (1), [K(18-crown-6)][(C_6F_5)_3B(mu-NC)B(C_6F_5)_3] (2), [K(18-crown-6)][NCB(C_6F_5)_3](3), [Me_3Si(mu-NC)B(C_6F_5)_3] (4) and [Hg{(mu-CN)B(C_6F_5)_3}_2] (5) have been synthesised. Reaction between [IrCl(PPh_3)_2(CO)] and one equivalent of 4 gives [Ir{(mu-NC)B(C_6F_5)_3}(PPh_3)_2CO] (6). Similarly, the reaction between [Fe(eta-C_5H_5)(CO)_2Cl] and 4 gives [Fe{(mu-NC)B(C_6F_5)_3}(eta-C_5H_5)(CO)_2] (7a). The NMR-scale reaction between [Fe(eta-C_5H_5)(CO)_2CN] and B(C_6F_5)_3 gives the isomer [Fe{(mu-CN)B(C_6F_5)_3} (eta-C_5H_5)(CO)_2] (7b). In the compounds 3,4,6 and 7a the anion [NCB(C_6F_5)_3]~- is coordinated to the metal through the nitrogen. Complexes 1,2 and 7b incorporate a (mu-CN)B unit. The compounds containing the isomeric bridging (mu-CN)B or (mu-NC)B systems have been investigated by ~(11)HB{~1H} NMR spectroscopy and by DFT calcualtions. The ~(11)B{~1H} NMR spectra enable distinction between the isomers. The single-crystal X-ray strucutres of 1,3 and 7a have been determined.
机译:新化合物[K(18-crown-6)] [SCNB(C_6F_5)_3](1),[K(18-crown-6)] [(C_6F_5)_3B(mu-NC)B(C_6F_5)_3] (2),[K(18-crown-6)] [NCB(C_6F_5)_3](3),[Me_3Si(mu-NC)B(C_6F_5)_3](4)和[Hg {(mu-CN) B(C_6F_5)_3} _2](5)已合成。 [IrCl(PPh_3)_2(CO)]与1当量4的反应得到[Ir {(mu-NC)B(C_6F_5)_3}(PPh_3)_2CO](6)。类似地,[Fe(η-C_5H_5)(CO)_2Cl]与4之间的反应得到[Fe {(mu-NC)B(C_6F_5)_3}(η-C_5H_5)(CO)_2](7a)。 [Fe(eta-C_5H_5)(CO)_2CN]与B(C_6F_5)_3之间的NMR级反应给出异构体[Fe {(mu-CN)B(C_6F_5)_3}(eta-C_5H_5)(CO)_2 ](7b)。在化合物3、4、6和7a中,阴离子[NCB(C_6F_5)_3]-通过氮与金属配位。配合物1,2和7b结合了(μ-CN)B单元。已通过〜(11)HB {〜1H} NMR光谱和DFT计算研究了含有异构桥接(mu-CN)B或(mu-NC)B系统的化合物。 〜(11)B {〜1H} NMR光谱可区分这些异构体。已经确定了1,3和7a的单晶X射线结构。

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