Synthesis and Crystal Structure of Monochloridehepta(dimethyl sulfoxide)gadolinium(Ⅲ) di(tetraphenyl boron) Salt 〔Gd(dmso)_7Cl〕〔BPh_4〕_2

１　ＩＮＴＲＯＤＵＣＴＩＯＮＳｕｌｆｏｘｉｄｅｉｓｋｎｏｗｎｔｏｆｏｒｍｃｏｏｒｄｉｎａｔｉｏｎｃｏｍｐｏｕｎｄｓｗｉｔｈＬａｎｔｈａｎｉｄｅ（Ⅲ）ａｎｄｔｈｅｉｒｓｙｎｔｈｅｓｅｓ,ｐｒｏｐｅｒｔｉｅｓａｎｄｖａｒｉｏｕｓｐｈｙｓｉｃａｌｃｈａｒａｃｔｅｒｉｓｔｉｃｓｈａｖｅｂｅｅｎｒｅｐｏｒｔ－ｅｄ〔１～９〕．Ｈｏｗｅｖｅｒ,ｔｈｅｒｅａｒｅｓｏｍａｎｙｄｉｆｆｉｃｕｌｔｙｉｎｐｒｅｐａｒｉｎｇｔｈｅｋｉｎｄｏｆｌａｎｔｈａｎｉｄｅｃｏｍｐｌｅｘｅｓｂｅｃａｕｓｅｔｈｅａｎｉｏｎｓｕｓｅｄａ…     

Asymmetric Cyclopropanation Catalyzed by Four Stereoisomers of a Copper-(Schiff-base) Complex with Double Chiral Centers

Catalytic asymmetric cyclopropanation of diazoacetates with olefins has attracted much attention. Those catalysts containing various metals and optically active ligands have been employed for this reaction1,2. The first catalytic asymmetric cyclopropanation reaction was reported in 1966 by Nozaki et al.3. The author used the copper(II) complex 1 bearing a salicyladimine ligand as catalyst though with a low e.e. value of 6%. Aratani and his coworkers designed the copper-(Schiff-base) comp…     

Determination of Cordycepin in Cordyceps kyushuensis by Capillary Electrophoresis and its Antitumour Activity

~~Determination of Cordycepin in Cordyceps kyushuensis by Capillary Electrophoresis and its Antitumour Activity~~     

The Elastic Continuum Limit of the Tight Binding Model

The authors consider the simplest quantum mechanics model of solids,the tight binding model,and prove that in the continuum limit,the energy of tight binding model converges to that of the continuum elasticity model obtained using Cauchy-Born rule.The technique in this paper is based mainly on spectral perturbation theory for large matrices.