取代苄基五甲氧羰基环戊二烯的合成和晶体结构

五甲氧羰基环戊二烯基钾和取代苄基卤化物反应, 合成了七个新型苄基取代五甲氧羰基环戊二烯。由^1H NMR、IR、元素分析等确认R(苄基)和环戊二烯上碳直接相连, 具有典型的碳碳连结。对产物之一, 1-萘亚甲基五甲氧羰基环戊二烯的X射线衍射测定, 进一步肯定了上述结论。化合物为单斜晶系, 空间群为P2/n, a=0.9731(1), b=1.7403(3), c=1.465(3)nm; β=95.70(1)^°, v=2.4712nm^3, D~c=1.334g/cm^3, 最终的R=0.093, 萘亚甲基环与环戊二烯基环的二面角为68.19^°。

Synthesis and crystallographic structure of substituted benzyl pentamethoxycarbonyl cyclopentadienes

Seven title compounds have been synthesized from the reaction of potassium pentamethoxycarbonylcyclopentadienide with substituted benzyl halides. All of these products have the carbon-carbon linkage to the cyclopentadiene ring. An x-ray diffraction investigation of 1-naphthylmethylpentamethoxycarbonylcyclopentadiene has unequivocally established its structure. The plane angle between the naphthalene ring and the cyclopentadiene ring is 68.19?