ABSTRACT
A hybrid organic-inorganic chain compound of the family Mn(II)-bpa-(NCO) is presented. It contains, unusually, five different dispositions for the bpa [1,2-bis(4-pyridyl)ethane] ligand. Water molecules and free bpa ligands occupy the voids of the structure. The compound shows significant antiferromagnetic-type interactions as a consequence of different exchange pathways.
Subject(s)
2,2'-Dipyridyl/chemistry , Manganese/chemistry , Nitriles/chemistry , Organometallic Compounds/chemistry , Organometallic Compounds/chemical synthesis , Electron Spin Resonance Spectroscopy , Ligands , Models, Molecular , Molecular Conformation , Stereoisomerism , TemperatureABSTRACT
The compound [Ni(3)(tppz)(2)(NCS)(2)(H(2)O)(4)](NO(3))(4).4H(2)O [tppz = 2,3,5,6-tetrakis(2-pyridyl)pyrazine and NCS = thiocyanate ligand] consists of trimeric units, where the three Ni(II) cations are linked by two bis-tridentate tppz ligands. This compound crystallizes in the monoclinic space group C2/c, with Z = 4, a = 25.1116(12) A, b = 10.8127(5) A, c = 25.2294(13) A, and beta = 116.856(5) degrees . The crystal structure is in good agreement with the antiferromagnetic interactions because of unidirectional coupling through the tppz ligands.
