Chemistry of O-Benzoquinones and Masked O-Benzoquinones IV. Synthesis of O-Spirodienonelactones from Unsymmetric Catechols

We describe the syntheses of 6, 8-di-tert-butyl-, 7, 9-di-tert-butyl., 6,7-di-n-propyl and 8, 9-di-n-propyl-O-spirodienonelactone from 3, 5-di-tert-butylcatechol and 3, 4-di-n-propylcatechol.     

Studies on Fragrance Raw Materials of α-Terpineol Analogues

Thirty four α-substituted or α, α-disubstituted-( 1-methylcyclohexen-4-yl )methanols and α-substituted or α,α-disubstituted-(4-methylcyclohexyl) methanols weresynthesized. Thirty two of them are new compounds. 1H NMR and IR spectra of allthe compounds were determined, MS spectra of some of them were obtained as well.The characteristic odors were evaluated.Keywords Fragrance raw materials,α-Terpineol analogues, Synthesis, Structuredetermination     

酚氧桥联的不对称双铜(Ⅱ)和铜(Ⅱ)-锌(Ⅱ)配合物的合成和磁性

本文合成了一组新的不对称双核配合物「Cu(samen)Cu(terp)」和「Cu(samen)Zn(terp)」,samen~4和terp分别表示N N’-乙二水杨酰胺胺根阴离子和2.2′:6′2″-联三吡啶。配合物「Cu(samen)Cu(terp)」的变温磁化率已测,其数值用最小二乘法与Bleancy-Bowers方程拟合,求得交换积分J=-0.538cm~(-1),表明配合物中铜离子间有极弱的反铁磁自旋交换作用。     

Synthesis and magnetic properties of trinuclear nickel(II) complexes bridged by α-benzyldioximato groups

Four new NiII–NiII–NiII homotrinuclear complexes namely [Ni(-BD)2{NiL2}](ClO4)2 [L = 1,10-phenanthroline (phen), 5-nitro-1,10-phenanthroline (5-NO2-phen), 2,2-bipyridyl (bpy) or 4,4-dimethyl-2,2bipyridyl (Me2bpy) and (-BD)– = -benzyldioximato ion] have been prepared and characterized. Based on elemental analyses, i.r. spectra, conductivity measurements, extended -benzyldioximato-bridged systems consisting of three nickel(II) ions in which the central nickel(II) ion has a square-planar environment and the end capped two nickel(II) ions have a distorted octahedral environment are proposed for these structures. The temperature dependence of the magnetic susceptibility for complexes (1) (phen), (2) (5-NO2-phen), (3) (bpy) and (4) (Me2bpy) were measured over the 77–300 K range and the observed data were successfully simulated by an equation based on the spin Hamiltonian operator (H^ = –2JS^1S^2), giving the exchange integral J = –13.31 cm–1 for (1), J = –7.37 cm–1 for (2), J = –8.96 cm–1 for (3) and J = –7.33 cm–1 for (4) These results indicate a weak antiferromagnetic spin exchange interaction between the two terminal nickel(II) io     

乙丙共聚物制润滑油粘度指数改进剂的研究

本文报导了一种用于乙丙共聚的高活性负载型催化剂(TiCl₄-FCl₃)/MgC1₂-Al(C₂H₅)₃利用催化剂中PCl₃的配体效应和反应过程中的氢调作用,得到低分子量,窄分子量分布的乙丙共聚物,适宜于用作润滑油的粘度指数改进剂。它在粘度指数、增稠能力、低温粘度、热安定性、氧化安定性以及剪切稳定性等使用性能上具有较好的综合指标。