The vibration spectra of the diiodides of the first-row transition metals: the infrared spectra of gaseous CaI2, MnI2 and ZnI2

✍ Scribed by R.J.M. Konings; J.E. Fearon

• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 375 KB
• Volume: 206
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(93)85516-q

✦ Synopsis

The infrared spectra of the gaseous Cat,, MnI, and ZnI, molecules have been measured by high-temperature infrared spectroscopy. The results are consistent with a linear geometry for all three molecules. On the basis of the present results and previous studies on the first-row transition metal iodides, the trends in the force constants of the Zn-Ca series are examined. It is shown that the stretching force constants steadily decrease from Zn to Ca, in agreement with an ionic bonding. The bending force eonstants show a different pattern, where the effect of the non-uniform distribution of the d electrons is evident from significant deviations from the Zn-Mn-Ca line for the iodides of nickel, iron and chromium.