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首页> 外文期刊>Polyhedron: The International Journal for Inorganic and Organometallic Chemistry >SYNTHESIS AND CHARACTERIZATION OF [(RHCL2)-CL-III(ETA(1)-C6H5)(PYR)(2)(SBPH3)], [(RHCL2)-CL-III(ETA(1)-C6H5)(PY)(2)(THZ)], [(RHCL2)-CL-III(ETA(1)-C6H5)(PY)(2)(PYR)], AND [(RHCL2)-CL-III(ETA(1)-C6H5)(CEP)(SBPH3)(2)] [PYR = PYRAZINE PY = PYRIDINE THZ =
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SYNTHESIS AND CHARACTERIZATION OF [(RHCL2)-CL-III(ETA(1)-C6H5)(PYR)(2)(SBPH3)], [(RHCL2)-CL-III(ETA(1)-C6H5)(PY)(2)(THZ)], [(RHCL2)-CL-III(ETA(1)-C6H5)(PY)(2)(PYR)], AND [(RHCL2)-CL-III(ETA(1)-C6H5)(CEP)(SBPH3)(2)] [PYR = PYRAZINE PY = PYRIDINE THZ =

机译：[（RHCL2）-CL-III（ETA（1）-C6H5）（PYR）（2）（SBPH3）]，[（RHCL2）-CL-III（ETA（1）-C6H5）（PY）的合成与表征（2）（THZ）]，[（RHCL2）-CL-III（ETA（1）-C6H5）（PY）（2）（PYR）]和[[RHCL2）-CL-III（ETA（1）- C6H5）（CEP）（SBPH3）（2）] [PYR =吡嗪PY =吡啶THZ =

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The mononuclear compounds trans-dichloro(eta(1)-phenyl) cis-bis(pyrazine)(triphenylstibine) rhodium(III) (i), and trans-dichloro(eta(1)-phenyl){N-(2-cyanoethylpyrrole)}trans-bis(triphenyls tibine) rhodium (III) (3) were prepared from trans-dichloro(eta(1)-phenyl)tris(triphenylstibine)rhodium (III) in ethanol. The mononuclear compounds trans-dichloro(eta(1)-phenyl)trans-bis(pyridine)(thiazole)rhodium(III) (2) and trans-dichloro (eta(1)-phenyl)trans-bis(pyridine)(pyrazine)rhodium(III) (4) were obtained from-trans-dichloro(eta(1)-phenyl) tris(pyridine)rhodium(III) in methanol. Compounds 1 and 2 were analysed via X-ray diffraction techniques from single crystals. The four compounds were characterized by spectroscopy and elemental analysis. The coordination sphere geometry for all the complexes is octahedral; the trans influence exerted by the phenyl ligand is responsible for a long Rh-N bond distance (2.263(3) Angstrom) and of large downfield shifts for H-1 NMR signals. The pyrazine ligands are monodentate in both 1 and 4. In the solid state the pyrazine ligands do not bridge the metal centres, Compounds 1 and 2 are barely stable in solution at room temperature. The thiazole molecule of 2 binds the metal through the nitrogen atom whereas sulfur does not show any donating ability. An extended-Huckel analysis shows that the pyrazine ligands contribute significantly to the frontier unoccupied molecular orbitals. The atomic charges on the non-metal bound nitrogen atoms of pyrazine ligands is -0.175 e in agreement with a bridging ability between two metal centres for this-ligand. (C) 1997 Elsevier Science Ltd. All rights reserved. [References: 32]
机译：单核化合物反式二氯（η（1）-苯基​​）顺式双（吡嗪）（三苯基stibine）铑（III）（i）和反式二氯（η（1）-苯基​​）{N-（2-氰基乙基吡咯） ）}从乙醇中的反式二氯（η（1）-苯基​​）三（三苯基三苯乙烯）铑（III）制备反式双（三苯基噻吩）铑（III）（3）。单核化合物反式二氯（η（1）-苯基​​）反式双（吡啶）（噻唑）铑（III）（2）和反式二氯（η（1）-苯基​​）反式双（吡啶）（吡嗪）铑（III）（4）是从甲醇中的反式-二氯（η（1）-苯基​​）三（吡啶）铑（III）获得的。通过X射线衍射技术从单晶分析化合物1和2。通过光谱学和元素分析对这四种化合物进行了表征。所有配合物的配位球几何均为八面体;苯基配体施加的反式影响导致长的Rh-N键距离（2.263（3）埃）和H-1 NMR信号的大下场偏移。吡嗪配体在1和4上都是单齿的。在固态下，吡嗪配体不桥接金属中心，化合物1和2在室温下几乎不稳定。噻唑分子2通过氮原子与金属结合，而硫没有显示任何给体能力。扩展的Huckel分析表明，吡嗪配体对前沿的未占据分子轨道有显着贡献。吡嗪配体的非金属结合氮原子上的原子电荷为-0.175 e，与该配体的两个金属中心之间的桥连能力一致。 （C）1997 Elsevier ScienceLtd。保留所有权利。 [参考：32]

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