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- W2079297635 abstract "Abstract The photolysis of 1,2-digermacyclobutane derivatives ( 1 ) with bulky bistrimethylsilylmethyl (disyl) groups in a toluene solution of C60 provided the germylene ( 2 ) and germacyclopropane ( 3 ) adducts of C60, respectively. The structures of the two products were characterized using 1 H- and 13 C-NMR spectra. The signals showed a dramatic change in line shape with temperature. The non-equivalence of the two disyl groups at high temperature, as well as the presence of quaternary aliphatic carbon, suggested that the germylene adduct ( 2 ) may be a closed [6,5] adduct: a possible first example of a closed [6,5]-bridged fullerene adduct. PM3 and ab initio calculations also support an energetically preferred closed [6,5] germacyclopropane adduct over an open [6,5] germa-annulene. The non-equivalence of the two disyl groups at low temperatures, as well as the presence of two methylene groups, indicated a germacyclopropane adduct ( 3 ), having a germacyclopentane structure that includes a closed [6,6] bond on the C60 surface. To take into account the regio-selective formation of the [6,5] adducts, a fragmentation mechanism of the digermacyclobutane on the C60 surface is proposed." @default.
- W2079297635 created "2016-06-24" @default.
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- W2079297635 date "2001-11-01" @default.
- W2079297635 modified "2023-09-30" @default.
- W2079297635 title "The photochemical reaction of 1,2-digermacyclobutane with C60: possible example of a closed [6,5]-bridged fullerene derivative of germacyclopropane" @default.
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- W2079297635 doi "https://doi.org/10.1016/s0022-328x(01)00823-3" @default.
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