113634-30-3Relevant academic research and scientific papers
Synthesis and Properties of Pentaazadienido Complexes of Divalent Cobalt. The Crystal Structure of 6*2 C9H12
Schmid, Raimund,Beck, Johannes,Straehle, Joachim
, p. 911 - 916 (2007/10/02)
Co(tolNNNNNtol)2 (1) is obtained from solutions of 1,5-di-p-tolyl-1,4-pentaazadiene and CoCl2*6 H2O in aqueous ammonia.It is a paramagnetic, explosive, red compound which reacts with alcohols to the alcoholates Co(OR)(tolNNNNNtol).The methoxy complex is hexameric.It crystallizes from mesitylene/methanol as 6*2 C9H12 in the triclinic space group P with the lattice constants: a = 1667.1(5), b = 1784.2(5), c = 2159.2(6) pm, α = 93.05(3) deg, β = 96.10(2) deg, γ = 64.63(2) deg, Z = 2.In the hexameric complex six Co atoms and six methoxy groups form a central twelve membered Co-O ring with a symmetry close to D3d.The pentaazadienide ligands act as additional bridges between two Co atoms, coordinating one Co atom monodentate with N1 and the other Co atom bidentate with N3 and N5.This leads to alternating tetrahedral and octahedral coordination of the Co atoms.The average Co-O distances are 192.3 pm in the CoO2N2 tetrahedron and 198.0 pm in the CoO2N4 octahedron.The corresponding Co-N distances are 206.3 and 221.4 pm respectively.In the planar N5 zigzag chain slightly elongated double bonds N1-N2 and N4-N5 of 128.2 pm and partial double bonds N2-N3 and N3-N4 of approximately 134.6 pm are observed. - Bis-cobalt(II), Hexakis1,η2-(1,5-ditolyl-1,4-pentaazadienido)(μ2-methoxy)cobalt(II)>, Synthesis, Crystal Structure
