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Substituent-dependent coordination modes of 1-methyl-5-R-tetrazoles in their cupric chloride complexes.
- Source :
-
Polyhedron . Apr2019, Vol. 162, p100-110. 11p. - Publication Year :
- 2019
-
Abstract
- Graphical abstract A strong effect of C5-substituent on coordination modes of 1-methyl-5-R-tetrazoles and structural motifs of their copper(II) chloride complexes was observed. Abstract A series of cupric chloride complexes with 1-methyl-5-R-tetrazole ligands, where R = NH 2 , t -Bu, Ph, MeS, CH CH 2 , MeSO 2 , were synthesized by interaction of CuCl 2 ·2H 2 O with the above ligands LNH 2 , LtBu, LPh, LMeS, LVin, and LMeSO 2 , respectively. The obtained complexes [Cu(LNH 2 ) 3 Cl 2 ]·H 2 O (1), [Cu(LtBu) 2 Cl 2 ] (2), [Cu(LPh) 2 Cl 2 ] (3), [Cu(LMeS) 2 Cl 2 ] (4), [Cu(LVin)Cl 2 ] n (5), and [Cu(LMeSO 2 )(H 2 O)Cl 2 ] n (6) were characterized by single crystal X-ray analysis. The effect of C5-substituent on coordination modes of tetrazole ligands and structural motifs of complexes was observed. Complexes 1 – 4 are mononuclear, with the tetrazole ring N4 coordination. Complex 5 presents 1D coordination polymer, formed at the expense of triple bridge between two neighboring copper(II) cations (double chlorido bridge and the tetrazole ring N3,N4-bridge). In 6 , being also 1D coordination polymer, coordination chains are composed of alternating Cu(LMeSO 2 ) 2 and Cu(H 2 O) 2 fragments linked by double chlorido bridges. Ligand LMeSO 2 shows N3 coordination, being rare among 1,5-disubstituted tetrazoles. The influence of the nature of C5 substituents on coordination features of the obtained complexes is discussed by using quantum-chemical calculations of the electronic structure and basicity of the ligands. [ABSTRACT FROM AUTHOR]
- Subjects :
- *COPPER chlorides
*TETRAZOLES
*CUPRIC chloride
Subjects
Details
- Language :
- English
- ISSN :
- 02775387
- Volume :
- 162
- Database :
- Academic Search Index
- Journal :
- Polyhedron
- Publication Type :
- Academic Journal
- Accession number :
- 135428271
- Full Text :
- https://doi.org/10.1016/j.poly.2019.01.009