Crystal structure of tris-(μ-bis-{4-[(pyridin-2-yl-methyl-idene)amino]-phen-yl}methane-κ(4) N,N':N'',N''')dizinc tetra-kis-(tetra-fluorido-borate) aceto-nitrile tris-olvate

Maria-Gabriela Alexandru; Florina Dumitru

doi:10.1107/S205698901502455X

Crystal structure of tris-(μ-bis-{4-[(pyridin-2-yl-methyl-idene)amino]-phen-yl}methane-κ(4) N,N':N'',N''')dizinc tetra-kis-(tetra-fluorido-borate) aceto-nitrile tris-olvate

Acta Crystallogr E Crystallogr Commun. 2015 Dec 31;71(Pt 12):m271-2. doi: 10.1107/S205698901502455X. eCollection 2015 Dec 1.

Authors

Maria-Gabriela Alexandru¹, Florina Dumitru¹

Affiliation

¹ Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, Polizu 1, 011061 Bucharest, Romania.

Abstract

The asymmetric unit of the title compound, [Zn2(C25H20N4)3](BF4)4·3CH3CN, consists of one dinuclear Zn(II) complex cation with a triple-helical [Zn2 L 3](4+) motif (L is bis-{4-[(pyridin-2-yl-methyl-idene)amino]-phen-yl}methane), four BF4 (-) anions and three CH3CN solvent mol-ecules. The Zn⋯Zn separation is 11.3893 (14) Å and the ligands wrap around the two Zn(II) atoms, forming a triple helix as defined by the Zn-N-N-Zn torsion angles of 104.05 (18), 99.06 (19) and 101.40 (19)°. The Zn-N(pyrid-yl) distances in the octahedral ZnN6 coordination sphere are in the range 2.128 (5)-2.190 (5) Å and the Zn-N(imine) distances are in the range 2.157 (5)-2.277 (5) Å.

Keywords: ZnII complex; crystal structure; triple-helical motif.