Poly{[μ-(2,5-dicarboxypyrazine- 3,6-dicarboxylato)-trans-diaquairon(II) dihydrate]}, a Member of a New Class of Quasi-Linear Chain Compounds. Preparation, Structure, and Magnetic Susceptibility

1986 ◽  
Vol 69 (5) ◽  
pp. 1004-1011 ◽  
Author(s):  
Pierre-Alain Marioni ◽  
Helen Steeckli-Evans ◽  
Werner Marty ◽  
Hans-Ulrich Güdel ◽  
Alan F. Williams
Keyword(s):  
Magnetic Susceptibility ◽  
Linear Chain ◽  
New Class ◽  
Chain Compounds

Magnetic Susceptibility Analyses of Alternating and Ladder-Like Copper (II) Linear Chain Compounds

1983 ◽  
Vol 52 (6) ◽  
pp. 2192-2201 ◽  
Author(s):  
Tsutomu Murasaki ◽  
Yoshiaki Tanaka ◽  
Norikiyo Uryû
Keyword(s):  
Magnetic Susceptibility ◽  
Linear Chain ◽  
Chain Compounds

Magnetic susceptibility of a linear chain antiferromagnet, TANOL, at very low temperatures

1976 ◽  
Vol 41 (2) ◽  
pp. 354-356 ◽  
Author(s):  
Masafumi Kumano ◽  
Yusaku Ikegami ◽  
Takashi Sato ◽  
Shinhachiro Saito
Keyword(s):  
Magnetic Susceptibility ◽  
Low Temperatures ◽  
Linear Chain

scholarly journals MAGNETIC PROPERTIES OF LINEAR CHAIN COMPOUNDS FORMED BY LANTHANIDE(III) IONS AND NITRONYL-NITROXIDE RADICALS

1988 ◽  
Vol 49 (C8) ◽  
pp. C8-861-C8-862 ◽  
Author(s):  
C. Benelli ◽  
A. Caneschi ◽  
D. Gatteschi ◽  
L. Pardi ◽  
P. Rey
Keyword(s):  
Magnetic Properties ◽  
Linear Chain ◽  
Nitronyl Nitroxide ◽  
Nitroxide Radicals ◽  
Chain Compounds

Structure and magnetic exchange in poly-bis(pyrazine)bis(methanesulfonato-O)-copper(II). One-dimensional exchange in a two-dimensional polymer

1987 ◽  
Vol 65 (2) ◽  
pp. 420-426 ◽  
Author(s):  
John S. Haynes ◽  
Steven J. Rettig ◽  
John R. Sams ◽  
Robert C. Thompson ◽  
James Trotter
Keyword(s):  
Magnetic Susceptibility ◽  
Heavy Atom ◽  
Linear Chain ◽  
Differential Scanning Calorimetric ◽  
Magnetic Exchange ◽  
Magnetic Susceptibility Data ◽  
Susceptibility Data ◽  
Pyridine Complex ◽  
Calorimetric Studies ◽  
Square Array

Crystals of poly-bis(pyrazine)bis(methanesulfonato-O)copper(II) are orthorhombic, a = 8.199(1), b = 13.130(1), c = 6.913(1) Å, Z = 2, space group Pnnm. The structure was solved by conventional heavy atom methods and was refined by full-matrix least-squares procedures to R = 0.025 and Rw = 0.033 for 1226 reflections with I ≥ 3σ(I). The complex contains parallel sheets, each sheet consisting of a square array of copper(II) ions bridged by two types of bidentate pyrazine ligands. The CuN4O2 chromophore is tetragonally elongated; the equatorial plane contains two pyrazine nitrogen atoms (Cu—N(1) = 2.058(2) Å) and two oxygen atoms from monodentate methanesulfonate ligands (Cu—O(1) = 1.956(1) Å); the axial sites are occupied by bridging pyrazine groups with significantly longer Cu—N bond lengths (Cu—N(2) = 2.692(2) Å) Magnetic susceptibility studies (82 to 4.2 K) reveal antiferromagnetic behaviour with a susceptibility maximum at about 6.2 K. Exchange coupling in the complex is considered to take place primarily via the more strongly bound, equatorially coordinated pyrazine ligands. Analysis of the magnetic susceptibility data according to a Heisenberg linear chain of interacting S = 1/2 spins yields best fit values of J = −3.82 cm−1 and g = 2.13. Vibrational and electronic spectroscopic and differential scanning calorimetric studies on the title compound and, for comparison, on the related mononuclear pyridine complex, bis(methanesulfonato)-tetrakis(pyridine)copper(II), are also reported.

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