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Reversible Binding of Ethylene and Propylene by Germylenes
Organometallics ( IF 2.5 ) Pub Date : 2019-03-28 , DOI: 10.1021/acs.organomet.9b00109
Kelly L. Gullett 1 , Ting Yi Lai 1 , Chia-Yuan Chen 1 , James C. Fettinger 1 , Philip P. Power 1
Affiliation  

The diarylgermylenes Ge(ArMe6)2 and Ge(AriPr4)2 (ArMe6 = C6H3-2,6-(C6H3-2,4,6-Me3)2), AriPr4 = C6H3-2,6-(C6H3-2,6-iPr2)2) are shown to react reversibly with ethylene. It is demonstrated that the more sterically crowded Ge(AriPr4)2 also reversibly binds propylene. The germirane products Ar2tiebar above startGeCH2tiebar above endCHR (Ar, R = ArMe6, H (1a), AriPr4, H (1b), and AriPr4, Me (1c)) were characterized via 1H and 13C NMR spectroscopy and by X-ray crystallography in the case of 1b. Thermolysis of Ge(AriPr4)2 under ethylene resulted in Ge–C bond homolysis and the formation of the digermene [(AriPr4)Ge(Et)]2 (1d). The thermodynamic parameters of the reactions were determined by variable-temperature 1H NMR spectroscopy.

中文翻译:

亚甲基对乙烯和丙烯的可逆结合

二芳基亚锗烷基Ge(Ar Me62和Ge(Ar i Pr42(Ar Me6 = C 6 H 3 -2,6-(C 6 H 3 -2,4,6-Me 32),Ar i Pr4= C 6 H 3 -2,6-(C 6 H 3 -2,6- i Pr 22)与乙烯可逆反应。结果表明,Ge(Ar i Pr42在空间上更拥挤。也可逆地结合丙烯。通过1 H和13 C NMR光谱表征了蓝宝石产物Ar 2上方的拉杆 GeCH 2末端上方的拉杆 CHR(Ar,R = Ar Me6,H(1a),Ar i Pr4,H(1b)和Ar i Pr4,Me(1c))。在1b的情况下通过X射线晶体学。乙烯下Ge(Ar i Pr42的热解导致Ge–C键均质化和Digermene [(Ar i Pr4)Ge(Et)] 21d)。反应的热力学参数通过可变温度1 H NMR光谱法确定。
更新日期:2019-03-28
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