Syntheses, crystal structures and supramolecular topologies of copper(II)–main group metal complexes derived from N, N′- o-phenylenebis(3-ethoxysalicylaldimine)

• Published in: Journal of molecular structure Vol. 1004; no. 1; pp. 204 - 214
• Main Authors: Mondal, Suraj, Hazra, Susanta, Sarkar, Sohini, Sasmal, Sujit, Mohanta, Sasankasekhar
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 12.10.2011
• Subjects: Cocrystal; Compartments; copper; crystal structure; Heterometallic; hydrogen bonding; Hydrogen bonds; Main group metal; metal ions; X-ray structure; Main group metal; Hydrogen bonds; X-ray structure; Cocrystal; Heterometallic
• ISSN: 0022-2860; 1872-8014
• DOI: 10.1016/j.molstruc.2011.08.005

► N, N′- o-phenylenebis(3-ethoxysalicylaldimine) is utilized as the blocking ligand. ► Eleven heterometallic Cu II Na I/K I/Ca II/Ba II/Pb II/Bi III complexes are described. ► All the 11 compounds are characterized by single-crystal X-ray structures. ► The complexes are di-/tri-/pentanuclear including [2 × 1 + 1 × 1]/[2 × 2 + 1 × 1] cocrystals. ► Weak interaction assisted one- or two-dimensional self-assemblies are generated. The work in the present investigation reports the syntheses, crystal structures and supramolecular topologies of 11 copper(II)–main group metal ion complexes [Cu IILNa I(NO 3)(H 2O)]·2CH 3CN ( 1), [Cu IILNa I(N 3)(CH 3OH)]·CH 3OH ( 2), [Cu IILNa I(ClO 4)(CH 3CN)]·0.5CH 3CN ( 3), [Cu IILNa I(BF 4)(CH 3OH)]·H 2O ( 4), [{Cu IILNa I(H 2O)} 2(Cu IIL)](BPh 4) 2 ( 5), [Cu IILK I(ClO 4)(CH 3COCH 3)] ( 6), [Cu IILCa II(ClO 4) 2(H 2O)] ( 7), [{Cu IILCa II(NO 3)(μ-NO 3)(H 2O)}(Cu IIL)]·H 2O·CH 3COCH 3 ( 8), [(Cu IIL) 2Ba II(NO 3) 2]·CH 3OH ( 9), [Cu IILPb II(NO 3) 2]·CH 3OH ( 10) and [Cu IILBi III(NO 3) 3]·CH 3COCH 3 ( 11), where H 2L = N, N′- o-phenylenebis(3-ethoxysalicylaldimine). Among these, eight ( 1–4, 6, 7, 10 and 11) are dinuclear compounds, one ( 9) is trinuclear double-decker sandwich compound, one ( 8) is a [2 × 1 + 1 × 1] trimetallic cocrystal of a dinuclear and a mononuclear units and the remaining ( 5) is a [2 × 2 + 1 × 1] pentametallic cocrystal of two dinuclear and one mononuclear units. All the 11 compounds 1–11 contain one or more deprotonated ligand, L 2−, the salen type N 2O 2 compartment of each of which is occupied by a Cu II ion to result in the formation of a [Cu IIL] moiety. On the other hand, the larger and open O(phenoxo) 2O(ethoxy) 2 compartment of the ligand in one or more [Cu IIL] moieties interact (s) with the metal ions Na I ( 1–5)/K I ( 6)/Ca II ( 7 and 8)/Ba II ( 9)/Pb II ( 10)/Bi III ( 11) to produce the title compounds. It has been observed that the neighbouring di/trinuclear units in 1/ 3/ 4/ 6/ 9/ 10/ 11 are self-assembled to one-/two-dimensional topologies as a result of one or more C H⋯O/O H⋯O hydrogen bonding interaction (s). Following self-assemblies are observed: one-dimensional in 4, one-dimensional helical in 1, one-dimensional double-chain (ladder) in 3, 6 and 10, two-dimensional in 9 and 11.