锗烷光化学。对行星研究有意义的气体混合物的光解。

Germane photochemistry. Photolysis of gas mixtures of planetary interest.

作者信息

Guillemin J C, Lassalle L, Janati T

机构信息

Université de Rennes, France.

出版信息

Planet Space Sci. 1995 Jan-Feb;43(1-2):75-81. doi: 10.1016/0032-0633(94)00164-m.

DOI:10.1016/0032-0633(94)00164-m

PMID:11538440

Abstract

Photolysis of germane (GeH4) in the presence of acetylene (C2H2), propyne (C3H4) or phosphine (PH3) with a 185 nm mercury lamp has been studied. The volatile products formed in these reactions are characterized by 1H, 31P and 13C NMR. Vinylgermanes are the first reaction products formed in the photolysis of GeH4 with alkynes. A reaction pathway is proposed. The initial step is the dissociation of germane 1 to hydrogen and GeH3 radicals. Addition of the germyl radical on alkyne is proposed as the next step. Vinyl-germanes are then formed by radical combination. Photolysis of ethenylgermane 2 gives diethenylgermane 3 in the presence of acetylene and digermaethane 4 in the presence of GeH4. The application of these findings to Jovian and Saturn atmospheric chemistry is discussed.

摘要

研究了在185纳米汞灯下，在乙炔（C₂H₂）、丙炔（C₃H₄）或磷化氢（PH₃）存在的情况下锗烷（GeH₄）的光解反应。这些反应中形成的挥发性产物通过¹H、³¹P和¹³C核磁共振进行表征。乙烯基锗烷是锗烷与炔烃光解反应中形成的首批反应产物。提出了一个反应途径。第一步是锗烷1分解为氢和GeH₃自由基。下一步是提出锗基自由基加成到炔烃上。然后通过自由基结合形成乙烯基锗烷。在乙炔存在的情况下，乙烯基锗烷2的光解产生二乙烯基锗烷3，在锗烷存在的情况下产生二锗乙烷4。讨论了这些发现对木星和土星大气化学的应用。