Open AccessThe Crystal and Molecular Structures of 2,5-Bis(2'-pyridyl)-pyrazine (BPPZ) and Some 3d Transition-Metal Complexes
Author(s) -
Antonia Neels,
Helen Stœckli-Evans
Publication year - 1993
Publication title -
chimia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.387
H-Index - 55
eISSN - 2673-2424
pISSN - 0009-4293
DOI - 10.2533/chimia.1993.198
Subject(s) - pyrazine , dihedral angle , ring (chemistry) , pyridine , crystallography , chemistry , ligand (biochemistry) , metal , planar , transition metal , crystal structure , crystal (programming language) , stereochemistry , molecule , hydrogen bond , medicinal chemistry , organic chemistry , biochemistry , receptor , computer graphics (images) , computer science , programming language , catalysis
The symmetrical ligand 2,5-bis(2'-pyridyl)pyrazine (BPPZ) exists in the extended form with a dihedral angle between the pyrazine and the pyridine rings of 7.88°. BPPZ forms symmetrical bis(bidenate) complexes with MnII, FeII, and CuII. The dihedral angles between the best planes through the planar pyrazine ring and the pyridine ring are 2.6° in the MnII complex, 4° in the FeII complex, and 8.5° in the CuII complex. The metal-Npy bond distances are shorter than standard values and similar in length to the metal-Npz distances.