What is it about?
Synthesis and crystal structure of a new Fe(II) complex with 5-chloro-2-(phenyldiazenyl) pyridine, (C11H8N3Cl1: Clazpy), an azoimine ligand.
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Why is it important?
In the title complex, [Fe(NCS)2(C11H8ClN3)2], the FeII atom is coordinated by two N atoms from the thiocyanate ligands and four N atoms from two chelating 5-chloro-2-(phenyldiazenyl)- pyridine ligands, generating a fairly regular FeN6 octahedral coordination geometry. The thiocyanate ions are in a cis disposition and the pyridine N atoms are in a trans orientation. In the crystal, a short intermolecular Cl--S contact [3.366 (3) A ° ] is observed.
Perspectives
supporting the strong σ-donor and π-acceptor property of Clazpy. The better π-back bonding from d6-Fe(II) to π* orbital of the Clazpy ligand makes slightly N=N distance to be longer comparison with MeaaiEt owing to the decreasing of N=N bond order, thus, the strength of the diazenyl bond decreases. All N(py)—Fe—N(py) and N(diazenyl)—Fe—NCS bond angles deviate from 180°, especially for N(6)—Fe(1)—N(8) = 168.44 (10)° during to the bite angle from the two Clazpy ligands. The torsion angles of pyridine-diazenyl-phenyl atoms, C(5)—N(2)—N(3)—C(6) and C(16)—N(5)—N(6)—C(17), are -176.4 (2) and -178.6 (2)°, respectively. In addition, the short contact between Cl(1) of clazpy and S(1) of isothiocyanato ligand are observed (Cl(1)···S(1) = 3.366 (3) Å) between two adjacent molecules
Assoc. Prof. Dr. Luksamee Vittaya
Rajamangala University of Technology Srivijaya
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This page is a summary of: Bis[5-chloro-2-(phenyldiazenyl-κN2)pyridine-κN]bis(thiocyanato-κN)iron(II), Acta Crystallographica Section E Structure Reports Online, April 2012, International Union of Crystallography,
DOI: 10.1107/s1600536812014286.
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