“…Therefore, the O2, N2 and N1 atoms are essentially in the same plane with the Cu atom. But the O1 atom has greater deviation The calculated parameters for H 2 BS and its Cu(II) complex are well in agreement with the previously reported values for the similar salen ligands and complexes [23][24][25][26][27][28][29][30][31][32][33][34][35][36], especially the compounds involving the 1,4-butanediamine bridge [23][24][25][26][27][28][29][30].…”