Halometallates of 1-methyl-4,4-dimercapto-piperidinium. Evidence of strong hydrogen bonds with participating thiol groups
1983; Elsevier BV; Volume: 2; Issue: 8 Linguagem: Inglês
10.1016/s0277-5387(00)87202-2
ISSN1873-3719
AutoresHeribert Barrera, Francesç Teixidor,
Tópico(s)Magnetism in coordination complexes
ResumoChlorometallates of transition and B subgroup elements are readily prepared and precipitated by reaction of the corresponding metallic salts with 1-methyl-4,4-dimercaptopiperidinium chloride. These chlorometallates investigated were [ZnCl4]2−, [CdCl3]−, [CoCl4]2−, [CuCl5]3− and [FeCl4]2−. Strong SH … Cl interactions, but not NH … Cl, have been evidenced by IR spectroscopy in the zinc, cadmium and cobalt complexes. The SH and NH absorptions are observed at ≅ 2480 cm−1 and 3060 cm−1, respectively. Partial deuteration of the [ZnCl4]2− complex with d1-methanol, shifted these IR signals to 1800 and 2260 cm−1, clearly evidencing a X-hydrogen type of bond. The SH … Cl interaction is smaller in the [FeCl4]2− complex, and practically nonexistent in the [CuCl53− complex.
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