Synthesis and characterization of [m (bqb)](m= Co, Ni, Cu),[n (n-bu)][co (bqb)(cn)], and [n (n-bu)][co (bqb)(n)] containing deprotonated N, n'-bis (2-quinolinecarboxamide)-1, 2-benzene (bqb)–X-ray crystal structures of [ni (bqb)] and [n (n-bu)][co (bqb)(n