Formation of the Magic Cluster Na₈ in Noble Gas Matrixes

Abstract

The sodium molecules Na(2), Na(4), and Na(8) have been isolated in argon matrixes at 15 K and characterized for the first time by Raman spectroscopy. The vibrational frequencies are compared with density functional (DFT) calculations. The Na(4) cluster possesses a rhombic structure (D(2h)) with calculated d(Na-Na) = 307.2 and 347.4 pm, respectively. For octasodium, a hypertetrahedral structure (T(d)) is predicted in which each side of an inner tetrahedron with d(Na-Na) = 331.5 pm is capped by sodium atoms with a distance of d(Na-Na) = 348.7 pm. The green octasodium cluster is the first example of a matrix-isolated magic number cluster. Its formation from blue tetrasodium is discussed on the basis of the observed sequence of cluster growth.

Orbitals in Inorganic Chemistry: Metal Rings and Clusters, Hydronitrogens, and Heterocyles

“…The Raman spectroscopy supported the rhombic structure for the Li 4 [44], Na 4 and K 4 clusters [45,46].…”

Effects of the source temperature on the formation of a metastable HgI2 phase and consequences for the nucleation and growth behaviors in PVT ampoules

“…3 and 4. As mentioned above, recent studies [7][8][9][10][11] indicate that vaporized clusters with specific nanostructure can exist in the vapor transport region as well as on the interface. With this assumption, the following scenario is proposed to explain our experimental observation as summarized in Table 1.…”

“…Recent studies on the cluster formation with magic numbers in gaseous phase [7,8], the long jumps of large molecules in surface diffusion [9], and the dynamic behavior of Si magic clusters on Si(1 1 1)-7 Â 7 surfaces [10,11] the vapor transport region as well as the vapor-solid interface. In such a case, during vapor growth techniques the role played by the nanostructure of these vaporized source clusters on the nucleation and growth phenomena is an interesting question and demands for further investigation.…”

Activation of C–H bonds of hydrocarbons by the ArH–alkali metal systems in THF (ArH – naphthalene, biphenyl, anthracene, phenanthrene, trans-stilbene, pyrene). Alkylation of naphthalene and toluene with ethene

“…[27][28][29][30]). Data of quantum-chemical calculations of such clusters are also available (see e.g.…”

“…Data of quantum-chemical calculations of such clusters are also available (see e.g. [28][29][30][31][32][33]). Recently, the metal vapour synthesis (MVS) and characterization of the cluster aryl Grignard reagents PhMg 4 X (X = F, Cl, Br) containing four magnesium atoms per one phenyl group and one halogen atom have been reported [34,35].…”