Abstract
Two neutral group 12 metal complexes, bis(pyrrol-2-ylmethyleneaminoethylthio)zinc(II) (1) and bis(pyrrol-2-ylmethyleneaminoethylthio)mercury(II) (2), with the (Nimine)2S2 coordination mode were synthesized by using metal-templated Schiff base condensation, and their molecular structures were determined by X-ray diffraction analysis. Complex 1 exhibits a distorted tetrahedral geometry around the metal, whereas the metal center has a bisphenoidal configuration in complex 2. Both mononuclear complexes possess intramolecular NH⋯S hydrogen bonds, as evidenced by IR, 1H NMR and X-ray crystallography. The hydrogen-bond donor (H-Npyrrole) and acceptor (S atom) are coming from different ligands within a single molecule. Complex 2 represents the first example of a mercury complex in the N2S2 coordination mode with intramolecular NH⋯S hydrogen-bond interactions. An investigation of the effects of the NH⋯S hydrogen bonding on the stability of 1 and 2, using an N-methyl pyrrolyl analogue, demonstrated that the N-H hydrogen-bond donor from the pyrrolyl moiety probably played a role in the stability of 1, but not 2.
Original language | English |
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Pages (from-to) | 2085-2091 |
Number of pages | 7 |
Journal | Journal of Organometallic Chemistry |
Volume | 694 |
Issue number | 13 |
DOIs | |
Publication status | Published - 2009 Jun 1 |
All Science Journal Classification (ASJC) codes
- Biochemistry
- Physical and Theoretical Chemistry
- Organic Chemistry
- Inorganic Chemistry
- Materials Chemistry