Thiosemicarbazone Derivatives of Copper(I): Influence of Substituents (R) at N1 Atom of [(C5H4N)HC2=N3N2H-C1(=S)N1HR] in the Formation of 1D or 2D Networks of Copper(I) Complexes

• Published in: ZAAC - Journal of Inorganic and General Chemistry Vol. 636; no. 15; pp. 2698 - 2703
• Main Authors: Lobana, Tarlok S., Sharma, Rekha, Castiñeiras, Alfonso, Butcher, Ray Jay
• Format: Book Review
• Language: English
• Published: Weinheim WILEY-VCH Verlag 01.12.2010; WILEY‐VCH Verlag
• Subjects: Copper; IR spectroscopy; NMR spectroscopy; Substituent effects; Thiosemicarbazones
• ISSN: 0044-2313; 1521-3749
• DOI: 10.1002/zaac.201000175

Copper(I) halides with N1‐substituted pyridine‐2‐carbaldehyde thiosemicarbazones [(C5H4N)HC2=N3N2H‐C1(=S)N1HR] in the presence of Ph3P have formed complexes of stoichiometry, [CuX(Hpytsc‐N1HR)(Ph3P)2] [X, R; Br, Me (1); Br, Et (2), Cl, Ph (3·CH3CN)]. All these complexes are characterised by elemental analysis, IR and NMR (1H, 31P) spectroscopy and X‐ray crystallography. The role of substituents at N1 atom of pyridine‐2‐carbaldehyde thiosemicarbazones in intermolecular interactions in copper(I) complexes is described. A 1D polymer of compound 1 is formed by intermolecular CH(methyl)···π(py) interactions. The hydrogen atoms of EtN1H and ethyl group interact with the phenyl ring of PPh3 {via EtN1H···π(Ph), H2CH(Et)···π(Ph)} to form a 1D polymer of 2. A 2D sheet arrangement of compound 3 is formed by pyridyl–phenyl (CH(py)···π(Ph)) interactions along the a axis and phenyl–phenyl [CH(Ph)···π(Ph)] interactions (phenyl at N1 with phenyl of PPh3) along the b axis.