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首页> 外文期刊>Organometallics >(-)-2-Methylindenyl and (-)-2-Menthyl-4,7-dimethylindenyl Complexes of Rhodium, Iridium, Cobalt and Molybdenum
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(-)-2-Methylindenyl and (-)-2-Menthyl-4,7-dimethylindenyl Complexes of Rhodium, Iridium, Cobalt and Molybdenum

机译:铑,铱,钴和钼的(-)-2-甲基茚基和(-)-2-甲基-4,7-二甲基茚基配合物

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摘要

Optically active complexes of Rh, Ir, Co, and Mo containing the chiral, methyl-subtituted indenyl ligands (-)-2-menthylindene and (-)-2-methyl-4,7-dimethylindene are described. Metathetic reaction of the chiral lithium salts of these indenyl systems (1,2) with the appropriate starting materials of Rh and Ir yielded the complexes (-)-(2-menthylindenyl)-Rh(COD) (3), (-)-(2-methyl-4,7-dimethylindenyl)Rh(COD) (4), (-)-(2-methylindenyl)Rh(C_2H_4)_2 (5), (-)-(2-methylindenyl)Ir(C_2H_4)_2 (8), (-)-(2-menthyl-4,7-dimethylindenyl)Ir(C_2H_4)_2 (9), and (-)-(2-menthyl-4,7-dimethylindenyl)Ir(coe)_2 (10). Co_2(CO)_* and CoCl_2(dppe) react with (-)-2-methylindenyllithium (1) yielding (-)-(2-menthylindenyl)Co(CO)_2 (11) and (+)-(2-menthylindenyl)Co(dppe) (12). (-)-Li[(2-methylindenyl)Mo(CO)_3](THF)_2 (13), formed by transmetalation of Mo(CO)_6, is oxidized by I_2, yielding (-)-(2-methylindenyl)Mo(CO)_3I (140< or by allylic chloride, yielding (allyl)(2-methylindenyl)Mo(CO)_2 (15). All compounds were formed stereomerically pure and were obtained after chromatography by dried alumina under nitrogen. The structures of 3,4,6,7, and 14 were determined by single-crystal X-ray diffractometry. Variable temperatures ~1H NMR spectra of 5,6,8, and 9 were recorded to determine the energy barriers for rotation of ethylene along the metal-indenyl and metal-ethylene axes.
机译:描述了含有手性,甲基取代的茚基配体(-)-2-薄荷基和(-)-2-甲基-4,7-二甲基茚的Rh,Ir,Co和Mo的光学活性络合物。这些茚基系统(1,2)的手性锂盐与适当的Rh和Ir原料发生易位反应,生成配合物(-)-(2-薄荷烯基)-Rh(COD)(3),(-)- (2-甲基-4,7-二甲基茚基)Rh(COD)(4),(-)-(2-甲基茚基)Rh(C_2H_4)_2(5),(-)-(2-甲基茚基)Ir(C_2H_4) _2(8),(-)-(2-薄荷基-4,7-二甲基茚基)Ir(C_2H_4)_2(9)和(-)-(2-薄荷基-4,7-二甲基茚基)Ir(coe)_2 (10)。 Co_2(CO)_ *和CoCl_2(dppe)与(-)-2-甲基茚基锂(1)反应生成(-)-(2-薄荷基)Co(CO)_2(11)和(+)-(2-薄荷基) Co(dppe)(12)。通过Mo(CO)_6的金属转移形成的(-)-Li [(2-甲基茚基)Mo(CO)_3](THF)_2(13)被I_2氧化,生成(-)-(2-甲基茚基) Mo(CO)_3I(140 <或通过烯丙基氯,得到(烯丙基)(2-甲基茚基)Mo(CO)_2(15)。所有化合物均形成立体异构纯,并在氮气下用干燥的氧化铝色谱纯化。用单晶X射线衍射法测定了3,4,6,7和14中的1,3,4,6,7和14,分别记录了5,6,8和9的可变〜1H NMR光谱,确定了乙烯沿乙烯旋转的能垒。金属茚基和金属乙烯轴。

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