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configuration at the phosphorus atoms. The configuration of the major isomer obeys the following empiric rule: if two chiral phosphorus centers in the macrocycle are linked by an odd number of methylene groups, the RSSR stereoisomer is adopted; if the phosphorus atoms in the macrocycle are linked by even number of methylene groups, the SSSS/RRRR isomer is formed [ 27 ]. The structural features of P 4 N 2 macrocycles define their coordination abilities. In this work, we present the synthesis of copper(I) complexes of 14-, 16-, 18- and 20-membered macrocyclic tetrakis

Abstract

A novel triply bridged dinuclear copper(I) complex: Cu2(μ-paa)(μ-dcpm)2(BF4)2·2CH2Cl2 [ paa = pyridine-2-carbaldehyde azine (C12H10N4) and dcpm = bis(dicyclohexylphosphino)methane(C25H46P2) ] has been synthesized and structurally characterized. Crystallographic studies of the complex showed that two copper(I) ions were bridged by one paa ligand and two dcpm ligands. The paa ligand adopted the Z configuration at the partially double N-N bond and the two copper ions have distorted tetrahedral coordination geometry. Because of the steric effect of dcpm, the pyridine rings of the paa ligand are obviously not on the same plane (the dihedral angle is 43.610). The interaction between neighboring ligands results in a N-N bond length (1.374(7) Å) contraction. The UV-vis spectra of the complex exhibited intense high-energy absorptions at λmax

A New Blue-emitting Diimine Copper(I) Complex: Synthesis, Crystal Structure and Photophysical Properties Jun Yinga,b, Ai-xiang Tiana, and Bin Lia,b a Key Laboratory for Polyoxometalate Science of the Ministry of Education, Faculty of Chemistry, Northeast Normal University, Changchun, 130024, Jilin, P. R. China b Key Laboratory of Excited State Processes, Changchun Institute of Optics Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, P. R. China Reprint requests to Bin Li. E-mail: lib020@yahoo.cn Z. Naturforsch. 2009, 64b, 287 – 291

Preparation of Some Novel Copper(I) Complexes and their Molar Conductances in Organic Solvents Dip Singh Gill and Dilbag Rana Department of Chemistry, Panjab University, Chandigarh-160 014, India Reprint requests to Prof. D. S. G.; Fax: +91-172-2545074; E-mail: dipgill@yahoo.com Z. Naturforsch. 64a, 269 – 272 (2009); received September 3, 2008 Attempts have been made to prepare some novel copper(I) nitrate, sulfate, and perchlorate complexes. Molar conductances of these complexes have been measured in organic solvents like acetonitrile (AN), acetone (AC

Abstract

A new ligand napaa (napaa = 7-acetamido-4-methyl-1,8-naphthyridin-2-carbaldehyde azine) and its two dinuclear copper(I) complexes, Cu2(napaa)(dppe)2(ClO4)2 (1) and Cu2(napaa)(PPh3)4(BF4)2 (2) (dppe = 1,2-bis(diphenylphosphino)ethane) and PPh3 = triphenylphosphine) were synthesized and characterized, and the structure of 1 was determined by X-ray crystal analysis. Each copper atom in 1 has a distorted tetrahedral geometry in which the metal center is associated to napaa and dppe ligands displaying chelating coordination modes and the naphthyridine rings of napaa are almost coplanar. The two complexes exhibit similar electronic absorption spectra with λmax at about 366 nm, which can be tentatively assigned to metal-to-ligand charge-transfer (MLCT) transition. The assignment was further supported by density functional theory (DFT) calculations.

A Dodecanuclear Copper(I) Complex Containing a Cubic (CuS)4 Core Stabilized by a Tripodal (N,N,P)-Chelating Ligand Margret M. Meinholz and Dietmar Stalke Institut für Anorganische Chemie, Georg-August-Universität Göttingen, Tammannstraße 4, 37077 Göttingen, Germany Reprint requests to Prof. Dr. D. Stalke. Fax: (+)49-551-39-3459. E-mail: dstalke@chemie.uni-goettingen.de Z. Naturforsch. 2011, 66b, 981 – 984; received July 18, 2011 We present the structure elucidation of a copper(I) complex of a monoanionic phosphanylalkyl-di- imido sulfonate ligand centered by

63Cu NMR Studies of Copper (I) Complexes in Solution: Influence of Anion, Solvent and Temperature on the Linewidth and Chemical Shift of the Copper Resonance Peter Kroneck Fakultät für Biologie, Universität Konstanz Jürgen Kodweiß, Otto Lutz, Alfons Nolle, and Daniela Zepf Physikalisches Institut, Universität Tübingen Z. Naturforsch. 37a, 1 8 6 - 1 9 0 (1982); received January 27, 1982 The behaviour of the 63Cu nuclear magnetic resonance signals in tetrahedrally coordinated copper(I) complexes has been investigated as a function of temperature, solvent

Enantiomerically Pure C2-symmetric Dinuclear Silver(I) and Copper(I) Complexes from a Bis(2,2′-bipyridine)-substituted 9,9′-Spirobifluorene Ligand Torsten Piehler and Arne Lützen Universität Bonn, Kekulé-Institut für Organische Chemie und Biochemie, Gerhard-Domagk-Straße 1, 53121 Bonn, Germany Reprint requests to Prof. Dr. Arne Lützen. Fax: +49 228 73 9608. E-mail: arne.luetzen@uni-bonn.de Z. Naturforsch. 2010, 65b, 329 – 336; received December 1, 2009 Dedicated to Professor Rolf Saalfrank on the occasion of his 70th birthday We have prepared a new bis

Synthesis, Electronic Spectra and Solvent-Induced Reversible Dissociation of Diphosphine(hexafluoroacetylacetonato)copper(I) Complexes Valeri Pawlowski, Andreas Strasser, and Arnd Vogler Institut für Anorganische Chemie, Universität Regensburg, D-93040 Regensburg, Germany Reprint requests to Prof. Dr. A. Vogler. E-mail: arnd.vogler@chemie.uni-regensburg.de Z. Naturforsch. 58b, 950 – 954 (2003); received July 11, 2003 The complexes CuI(P-P)(hfac) with P-P = 1,2-bis(diphenylphosphino)ethane (diphos), 1,3-bis- (diphenylphosphino)propane (prophos), 2,2’-bis

The Nuclear Quadrupole Resonance of the 6365Cu Nuclei in Copper (I) Complexes* Edwin A. C. Lucken Departement de Chimie Physique, Universite de Geneve, 30, quai Ernest-Ansermet, 1211 Geneve 4, Switzerland Z. Naturforsch. 49a, 155-166 (1994); received August 23, 1993 The 63Cu NQR spectra of Cu(I) complexes are surveyed and discussed in terms of the coordina­ tion number of the copper atom, the nature of the ligands and the charge of the complex. Introduction The Importance o f Copper and Copper (I) Compounds Copper (I) occurs in a variety of systems of current