Some Remarks on Homological Dimension

本文推广了环的R-序列的概念,引进了相伴R-序列,讨论了Jacobson根具有AR-性质的Noetherian环的同调维数及其结构性质,推广了交换局部环和半局部环的一些同调性质。

IR, 1H NMR, Electronic Properties and Conductivity Studies of N1 ,N4-Bis（Diphme）Benzene-l,4-Diamine Chloride Zirconium （IV） [{（Ar）2NC6H5N（Ar）2}ZrCl4] （Ar = C6H5）

A range of new compounds such as N1,N4-bis（diphenylmethlene）benzene-l,4-diamine zirconium （IV） chloride [{（Ar）2NC6HsN（Ar）z}ZrCl4] （Ar = C6H5） complex counting the chelating amine and chloride in position trans have been prepared. Well-defined NI,N4-bis（diphenylmethlene）benzene-l,4-diamine zirconium （IV） chloride [{（Ar）2NC6H5N（Ar）2}ZrCl4] （Ar = C6H5） was obtained by stoichiometric addition of {（Ar）2NC6H5N（Ar）2} （Ar = C6H5） and {ZrC14} in ethanol at reflex temperature. IR, 1H NMR, electronic properties using hyperchem program study has been improved for this compound such as bond distance, and this compound was also defined as electric conductivity which proves to be useful for conductively compound.