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| Titel: |
Three new thiocyanato-bridged complexes of cadmium(II): syntheses, X-ray crystal structures and thermal properties |
| Auteur: |
Sain, Saugata Maji, Tapas Kumar Mostafa, Golam Lu, Tian-Huey Chaudhuri, Nirmalendu Ray |
| Verschenen in: |
Journal of coordination chemistry |
| Paginering: | Jaargang 56 (2003) nr. 13 pagina's 1157-1168 |
| Jaar: |
2003-09-10 |
| Inhoud: |
Three new thiocyanato-bridged polymers of cadmium(II), [Cd(me4dpt)(SCN)2]n (1) [me4dpt = 3,3'-iminobis(N,N-dimethylpropylamine], [Cd(me2tn)(SCN)2]n (2) (me2tn = N,N'-dimethyl-1,3-propanediamine) and [{amphyH} {Cd(SCN)3}]n (3) (ampyH = 4-aminopyridinium cation), have been synthesized and their molecular structures determined through X-ray crystallography. In Complex 1 each square pyramidal mononuclear fragment is H-bonded (N - H…S) to form a 1D supramolecular chain. Complex 2 is a 1D coordination polymer in which each distorted octahedral cadmium(II) ion is linked with the four bridging thiocyanates and one diamine. The structure of 3 reveals anionic [Cd(SCN)3]- zigzag chains arranged in an approximately hexagonal array with the 4-aminopyridinum cations occupying triangular channels. Each chain is H-bonded (N-H…N) to form a 2D supramolecular network. Upon heating, 1 and 2 melt and transform to transparent solid masses at ambient temperature over a few days. On scratching, these turn to a fine powder. This phenomenon is repeatable. Complex 3 upon heating loses a 4-aminopyridine molecule and transforms to [H][Cd(SCN)3] at ~ 195°C. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
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