Synthesis, characterization, and thermal properties of N,N,N',N'-tetramethyl guanidinium tribromidocadmate(II) exhibiting an unusual coordination geometry.
In: Main Group Metal Chemistry, Jg. 40 (2017-12-01), Heft 5/6, S. 137-143
Online
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Zugriff:
The reaction of N,N,N',N'-tetramethyl guanidine, NHC(N(CH3)2)2 (TMGD) and CdBr2 · 4H2O in ethanol led to the formation of [TMGDH][CdBr3] (1), which crystallizes in the monoclinic space group Cc with Z = 4, a = 8.9079(7) Å, b = 18.5810(14) Å, c = 8.1637(6) Å, β = 107.953(3)°, and V = 1285.44(17) Å3. In the crystal lattice, 1 is organized in one-dimensional anionic chains of CdBr4 tetrahedra sharing two corners. To our knowledge, this is the first evidence of such a coordination geometry described for a bromocadmate derivative. The negative charges are compensated by monoprotonated N,N,N',N'-tetramethyl guanidinium cations (TMGDHs), which are in N-H hydrogen bonding interaction with the terminal bromide atoms of the anionic chain. The title compound was also characterized by middle and far-infrared spectroscopy, thermogravimetric analysis (TGA), and differential scanning calorimetry (DSC). The elemental analysis corroborates as well the X-ray elucidation. Multinuclear solution nuclear magnetic resonance (NMR) spectroscopic measurements (1H, 13C{1H}) were conducted in D2O. [ABSTRACT FROM AUTHOR]
Titel: |
Synthesis, characterization, and thermal properties of N,N,N',N'-tetramethyl guanidinium tribromidocadmate(II) exhibiting an unusual coordination geometry.
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Autor/in / Beteiligte Person: | Ndiaye, Mamadou ; Samb, Abdoulaye ; Diop, Libasse ; Cattey, Hélène ; Pourchet, Sylvie ; Plasseraud, Laurent |
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Zeitschrift: | Main Group Metal Chemistry, Jg. 40 (2017-12-01), Heft 5/6, S. 137-143 |
Veröffentlichung: | 2017 |
Medientyp: | academicJournal |
ISSN: | 0792-1241 (print) |
DOI: | 10.1515/mgmc-2017-0028 |
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