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首页> 外文期刊>Organometallics >Molybdenum and Tungsten Complexes That Contain the Diamidoamine Ligands [(C_6F_5NCH_2CH_2)_2NMe]~(2-), [(3,4,5-C_6H_2F_3NCH_2CH_2)_2NMe]~(2-),and [(3-CF_3C6H_4NCH_2CH_2)_2NMe]~(2-)
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Molybdenum and Tungsten Complexes That Contain the Diamidoamine Ligands [(C_6F_5NCH_2CH_2)_2NMe]~(2-), [(3,4,5-C_6H_2F_3NCH_2CH_2)_2NMe]~(2-),and [(3-CF_3C6H_4NCH_2CH_2)_2NMe]~(2-)

机译:含二氨基胺配体[(C_6F_5NCH_2CH_2)_2NMe]〜(2-),[(3,4,5-C_6H_2F_3NCH_2CH_2)_2NMe]〜(2-)和[(3-CF_3C6H_4NCH_2CH(2N_2)_2 2-)

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摘要

Molybdenum and tungsten complexes have been prepared that contain three different types of diamidoamine ligands of the type [(ArNCH_2CH_2)_2NMe]~(2-) ([ArNMe]~(2-), where Ar = C_6F_5, 3,4,5-F_3C_6H_2, 3-CF_3C_6H_4). The starting materials, which are of the type [Et_3NH]-{[ArNMe]MCl_3}, are prepared from MCl_4 reagents and the ligand upon addition of triethylamine. X-ray studies for [Et_3NH]{[C_6F_5NMe]MoCl_3}, [Et_3NH]{[C_6F_5NMe]WCl_3}, and [Bu_4N]{[3-CF_3C_6H_4NMe]MoCl_3} reveal that the amido nitrogens are approximately cis to one another in a distorted-pseudooctahedral environment. Addition of various alkylating reagents to various [Et_3NH]{[ArNMe]MCl_3} species led to the formation of [C_6F_5NMe]MoMe_2 (3), [C_6F_5NMe]Mo(CH_2CMe_3)Cl (4b), [C_6F_5NMe]W(CH_2CMe_3)Cl (5), [3,4,5-F_3C_6H_2NMe]Mo-(CH_2CMe_3)Cl (8), [3,4,5-F_3C_6H_2NMe]Mo(CH_2CMe_3)(CCMe_3) (9), [3,4,5-F_3C_6H_2NMe]Mo(CH_2-SiMe_3)_2 (10), [3,4,5-F_3C_6H_2NMe]W(CH_2CMe_3)(CCMe_3) (Ha), [3,4,5-F_3C_6H_2NMe]W(CH_2-SiMe_3)(CSiMe_3) (lib), [3-CF_3C_6H_4NMe]Mo(CH_2SiMe_3)_2 (13), [3-CF_3C_6H_4NMe]Mo(CH_2CMe_3)Cl (14), and [3-CF_3C_6H_4NMe]Mo(CCMe_3)(CH_2CMe3) (15). All M~(4+) complexes are paramagnetic with magnetic moments that are expected for high-spin d~2 complexes. X-ray studies of 3, 4b, and 9 show them to be trigonal-bipyramidal species in which the amido nitrogens occupy equatorial positions. The alkylidyne complexes form via elimination of dihydrogen, an "alpha,alpha-dehydrogenation" reaction, as shown by measuring the dihydrogen evolved in one case.
机译:已制备了包含三种不同类型的[[ArNCH_2CH_2)_2NMe]〜(2-)([ArNMe]〜(2-),其中Ar = C_6F_5、3,4,5- F_3C_6H_2、3-CF_3C_6H_4)。 [Et_3NH]-{[ArNMe] MC1_3}类型的起始原料是在加入三乙胺后由MC1_4试剂和配体制备的。对[Et_3NH] {[C_6F_5NMe] MoCl_3},[Et_3NH] {[C_6F_5NMe] WCl_3}和[Bu_4N] {[3-CF_3C_6H_4NMe] MoCl_3}的X射线研究表明,酰胺基氮原子彼此之间是顺式近似的。扭曲的伪八面体环境。将各种烷基化试剂添加到各种[Et_3NH] {[ArNMe] MCl_3}物种中导致形成[C_6F_5NMe] MoMe_2(3),[C_6F_5NMe] Mo(CH_2CMe_3)Cl(4b),[C_6F_5NMe] W(CH_2CMe_3Cl) (5),[3,4,5-F_3C_6H_2NMe] Mo-(CH_2CMe_3)Cl(8),[3,4,5-F_3C_6H_2NMe] Mo(CH_2CMe_3)(CCMe_3)(9),[3,4,5- F_3C_6H_2NMe] Mo(CH_2-SiMe_3)_2(10),[3,4,5-F_3C_6H_2NMe] W(CH_2CMe_3)(CCMe_3)(Ha),[3,4,5-F_3C_6H_2NMe] W(CH_2-SiMe_3)(CSiMe_3 )(lib),[3-CF_3C_6H_4NMe] Mo(CH_2SiMe_3)_2(13),[3-CF_3C_6H_4NMe] Mo(CH_2CMe_3)Cl(14)和[3-CF_3C_6H_4HMe] Mo(CCMe_3)(CH_2CMe3)(15)。所有M〜(4+)配合物都是顺磁性的,具有高旋转d〜2配合物所期望的磁矩。 X射线对3、4b和9的研究表明,它们是三角双锥体类,其中酰胺氮占据赤道位置。如通过在一种情况下测量所产生的二氢所示,亚烷基复合物通过消除二氢,“α,α-脱氢”反应而形成。

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