Nitrogen-containing heterocycles from metal β-diketonates
摘要:
Factors determining the reaction of metal beta-diketonates with hydrazine, in particular the nature of central metal ion and structure of beta-diketonate ligand, are discussed. The possibility for the preparation of other heterocyclic compounds via reaction of metal acetylacetonates with phenylhydrazine, o-phenylenediamine, urea, and thiourea was studied.
The molecular structures and magnetic properties of μ3-tetranuclear β-diketonate copper complexes [Cu(bzac)(μ3-OC2H4OCH3)]4 and [Cu(μ-dbm)(μ3-OC2H4OCH3)]4
摘要:
[Cu(bzac)(OC2H4OCH3)]4dagger (I) and [Cu(dbm)(OC2H4OCH3]4dagger (II) have been shown to be tetrameric in the solid state. Compound I has a pseudo-cubane type structure with mu3-alkoxide oxygens occupying four bridging positions. Two methoxy oxygens are also within bonding distance of copper(II) ions. Compound II has a stepped configuration with a chelate ring and alkoxide oxygens as bridging centres. None of the methoxy oxygens is clearly chelating. Magnetic susceptibility data versus temperature data to 4 K for the complexes show antiferromagnetic coupling which can be treated by ''pairs of equal dimers'' procedures. The complexes decompose in stages at temperatures below 350-degrees-C at atmospheric pressure to give CuO.
Formation and Spectral Properties of Some Bis(β-diketonato)copper(II)–Diazole Complexes
作者:Tamizo Kogane、Reiko Hirota
DOI:10.1246/bcsj.53.91
日期:1980.1
The reactions of bis(β-diketonato)copper(II) with pyrazole and imidazole gave the diazole adducts Cu(β-dik)2(Hdzl) (β-dik=β-diketonate anion; Hdzl=diazole) and/or the μ-diazolato complexes [Cu(β-dik)(dzl)]n (n=2,4,….). The complexation reactions are very sensitive to the nature of the diazole and to the reaction conditions, sometimes giving different products depending upon the solvent used. In chloroform
Quantitative prediction of nuclear-spin-diffusion-limited coherence times of molecular quantum bits based on copper(<scp>ii</scp>)
作者:S. Lenz、K. Bader、H. Bamberger、J. van Slageren
DOI:10.1039/c6cc07813c
日期:——
We have investigated the electron spin dynamics in a series of copper(ii) β-diketonate complexes both in frozen solutions and doped solids. We simulate the coherence decay quantitatively without fit parameters.
Abstract Bis(benzotriazol-l-yl) methylimine was used as a novel electrophilic cyanatingagent for labileβ-diketonates (M = Cu II , Ni II , Co II , Zn II and Cd II ). The actual cyanating species was 1 -cyanobenzotriazole formed in situ with the elimination of benzotriazole. The labile metal-oxygen bond in the chelates possibly induced debenzotriazolation. The inert and less labileβ-diketonates did not
Conformational studies of mixed-ligand copper(II) chelates. Crystal and molecular structure of (N,N-dimethyl-N′-ethyl-1,2-diaminoethane-(1-phenyl-1,3,-butanedionato)copper(II) perchlorate
作者:Chris Tsiamis、Leandros C. Tzavellas、Constantin A. Kavounis、Christine J. Cardin
DOI:10.1016/s0020-1693(96)05190-0
日期:1997.1
The IR and ligand field spectra and the structure of the mixed-ligand compound [N,N-dimethyl-N′-ethyl-1,2-diaminoethane(1-phenyl-1,3-butanedionato)(perchlorato)copper(II)]), [Cu(dmeen)bzac(OClO3)], are reported. The structure was determined by single crystal X-ray diffraction analysis (triclinic, space group ). The structure is square pyramidal with the apical position occupied by one oxygen of the
混合配体化合物[ N,N-二甲基-N'-乙基-1,2-二氨基乙烷(1-苯基-1,3-丁二酮基)(高氯根)铜(II)的红外光谱和配体场光谱及结构]),[Cu(dmeen)bzac(OClO 3)]。通过单晶X射线衍射分析(三斜晶系,空间群)确定结构。该结构是方形金字塔形,其顶部位置被四面体高氯酸盐基团的一个氧占据(与铜的距离2.452(5)Å)。苯环的平面倾斜,与β-dionato部分的平面形成16.72(14)°的角度。含氮碱采用扭角为108.72(14)°的gauche构型。乙基是顺式相对于苯基基团的分子,它位于赤道位置,碳氮键的向量与CuNN平面形成143.9(3)°的角。相邻轴向氢与高氯根基团的氧的相互作用导致氢键的形成。红外光谱表明,在固体状态下的溴-或Cl -位移容易CLO 4 -基团。配体场光谱的移动表明极性溶剂沿着垂直于CuN 2 O 2平面的轴参与了与金属中心的供体-受体相互作用。
Synthesis and Physico-Chemical Studies of Some Mixed-Ligand Complexes of bis(Benzoylacetonato)copper(II) with Some Biologically Active Heterocyclic Chelating Donors
作者:R. C. Maurya、R. Verma、H. Singh
DOI:10.1081/sim-120021938
日期:2003.1.7
Six new mixed‐ligand complexes of copper(II) of the compositions [Cu(bzac)2(L)2], where bzacH = benzoylacetone and L = 3‐methyl‐2‐pyrazoline‐5‐one (MP) (1), 2,3‐dimethyl‐1‐phenyl‐3‐pyrazoline‐5‐one (DMPHP) (3), benzimidazole (BZL) (4) or benzothiazole(BZT) (5) and [Cu(bzac)2(L–L)], where L–L = 4‐amino‐2,3‐dimethyl‐1‐phenyl‐3‐pyrazoline‐5‐one (ADMPHP) (2) or 2‐aminobenzothiazole (ABZT) (6), have been