2,2′-Bipyrimidine (bipym)-bridged dinuclear complexes. Part 1. Preparation, crystal structure, and magnetic properties of [Ni2(H2O)8(bipym)][NO3]4and [Ni2(H2O)8(bipym)][SO4]2·2H2O

1993 ◽  
pp. 1179-1184 ◽  
Author(s):  
Giovanni De Munno ◽  
Miguel Julve ◽  
Francesc Lloret ◽  
Alain Derory
Keyword(s):  
Crystal Structure ◽  
Magnetic Properties ◽  
Dinuclear Complexes

Synthesis, spectroscopic characterization, X-ray crystal structure and magnetic properties of oxalato-bridged copper(II) dinuclear complexes with di-2-pyridylamine

2003 ◽  
Vol 353 ◽  
pp. 119-128 ◽  
Author(s):  
Sujittra Youngme ◽  
Gerard A van Albada ◽  
Narongsak Chaichit ◽  
Pimprapun Gunnasoot ◽  
Palangpon Kongsaeree ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Magnetic Properties ◽  
Spectroscopic Characterization ◽  
Dinuclear Complexes ◽  
X Ray

Intermolecular interaction energies and magnetic properties of spin-isolated multinuclear CuII complexes

2020 ◽  
Vol 76 (2) ◽  
pp. 166-176
Author(s):  
Juan F. Torres ◽  
Nestor J. Bello-Vieda ◽  
Mario A. Macías ◽  
Renato Rabelo ◽  
Francisco Lloret ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Magnetic Properties ◽  
Intermolecular Interaction ◽  
Trinuclear Complex ◽  
Dinuclear Complexes ◽  
Dispersion Forces ◽  
Interaction Energies ◽  
Framework Analysis ◽  
Magnetic Exchange ◽  
Exchange Constants

Dinuclear CuII complexes with 3,5-dinitrobenzoates and 2,2′-bipyridine (2) or 1,10-phenanthroline (3) were synthesized and characterized. A complete energy framework analysis using the HF/3-21G energy model was performed which found that dispersion forces and C—H...O interactions are responsible for the crystal structure features. The magnetic properties of the complexes show a weak magnetic exchange between spins, resulting in low exchange constants of −2.72 (1) cm−1 and −1.10 (1) cm−1 for complexes (2) and (3), respectively. This results from the low overlap between magnetic orbitals induced by 3,5-dinitrobenzoate bridges and the arrangement of the magnetic orbitals. Consequently, the dinuclear complexes (2) and (3) behave as spin-isolated multinuclear CuII species in contrast to the trinuclear complex with similar ligands.

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