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Helmut Sitzmann 《无机化学与普通化学杂志》1995,621(4):553-556
[(C5H2tBu3-1,2,4)2Pb] ( 1 ), [(C5HiPr4)2Pb] ( 2 ), and [(C5iPr5)2Pb] ( 3 ) have been obtained from PbCl2 and Li(C5H2tBu3-1,2,4), Na(C5HiPr4) and Na(C5iPr5), respectively. 3 exists as a 1 : 1 mixture of meso- 3 and rac- 3 which interconvert at elevated temperature via one-at-a-time rotation of isopropyl groups with ΔG# = 73.0 ± 1.5/73.7 ± 1.5 kJ/mol at 348 K. 3 is slightly bent in the solid state with an angle of 170(1)° between the ring normals. 相似文献
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