Multiple Bonds Between Main‐Group Elements and Transition Metals, CLXIV. Alkylrhenium(VI) Oxides‐Synthesis and Characterization
Multiple Bonds Between Main‐Group Elements and Transition Metals, CLXIV. Alkylrhenium(VI) Oxides‐Synthesis and Characterization
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主族元素和过渡金属之间的多重键，CLXIV 烷基（VI）氧化物的合成和表征。
DOI：
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发表时间：
1997
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影响因子：
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通讯作者：
Janos Minkb
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作者：
Fritz E. Kiihn;W. Herrmann;Janos Minkb
大多数烷基铼(VII)氧化物，例如((环)-C3H5)Re03 (2) 对温度和湿度相当敏感，但甲基三氧铼 (1) 除外。相应的烷基铼(VI)氧化物，具有式[RR'(O)-Re(μ-O)]2 [RR'(环)-C3H5(3)，iPr(4)； RCH3, R'C2H5 (5), RCH3, R'iPr (6)] 在这方面更加稳定。它们可以在室温下在空气中处理。它们是由 Re2O7 和二烷基锌前体合成的，经过充分表征，并且其产率比其 ReVII 同系物高得多。由 1 和二烷基锌化合物合成的混合四烷基四氧二铼 (VI) 络合物 (R # R') 形成顺式/反式异构体的混合物。它们在室温下是油状液体。 ReO 和 Re-Re 拉伸力常数作为键强度的量度，由红外和拉曼数据确定。
Most alkylrhenium(VII) oxides, e.g. ((cyclo)-C3H5)Re03 (2) are rather sensitive to temperature and moisture with the prominent exception of methyltrioxorhenium (1). The corresponding alkylrhenium(VI) oxides of formula [RR′(O)- Re(μ-O)]2 [RR′(cyclo)-C3H5 (3), iPr (4); RCH3, R′C2H5 (5), RCH3, R′iPr (6)] are much more stable in this regard. They can be handled in air at room temperature. They were synthesized from Re207 and dialkylzinc precursors, fully characterized and are available in much higher yields than their ReVII congeners. Mixed tetraalkyltetraoxodirhenium(VI) complexes (R # R′) synthesized from 1 and dialkylzinc compounds form as a mixture of cis/trans isomers. They are oily liquids at room temperature. The ReO and Re-Re stretching force constants as a measure of the bond strengths, were determined from IR and Raman data.