The ESR spectrum and structure of the mixed alkali metal cluster Na2K5 prepared using a rotating cryostat

✍ Scribed by B. Mile; C.C. Rowlands; P.D. Sillman; A.R. Yacob

• Publisher: Elsevier Science
• Year: 1995
• Tongue: English
• Weight: 459 KB
• Volume: 236
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(95)00256-4

✦ Synopsis

The ESR spectrum of the mixed alkali metal cluster, Na,K,, in an adamantane matrix prepared using a rotating cryostat has been observed. Its isotropic ESR parameters are g = 1.996, u(2Na) = 12.9 mT and &K) = 0.035 mT, indicating a SOMO with most of the unpaired spin density (82%) in the 3s orbitals of two sodium atoms. Like its congeners, Na,, K, and Li,, the mixed cluster has a pentagonal bipyramid structure (D,, symmetry) with a *A> ground state. The sodium atoms occupy the two apical positions and the five potassium atoms lie in the pentagonal basal plane.