Structures of Solvent-Free, Monomeric LiCCH, NaCCH, and KCCH

✍ Scribed by Douglas B. Grotjahn; Aldo J. Apponi; Matthew A. Brewster; Ju Xin; Lucy M. Ziurys

• Publisher: John Wiley and Sons
• Year: 1998
• Tongue: English
• Weight: 120 KB
• Volume: 37
• Category: Article
• ISSN: 0044-8249
• DOI: 10.1002/(sici)1521-3773(19981016)37:19<2678::aid-anie2678>3.0.co;2-6

✦ Synopsis

The simplest alkali metal acetylides MCCH were made in the gas phase for the first time (see drawing), and their bond lengths were determined by millimeter/submillimeter spectroscopy of their isotopomers. The M-C bond lengths r are the shortest known for organoalkali metal compounds. In the case of LiCCH, the experimentally determined Li-C distance of 1.888 Å has an estimated accuracy of ±0.0005 Å, which should allow a rigorous test of theoretical methods.