Mass Spectrometric Study of the Systems Boron—Carbon and Boron—Carbon—Silicon

Abstract

The vaporization behavior of the systems boron—carbon and boron—carbon—silicon has been studied with a mass spectrometer. In addition to the gaseous species characteristic of graphite, silicon carbide and boron, the molecules BC2, B2C, BCSi, BSi2, BC, and BSi were identified and their atomization energies measured. The values are: 294, 254, 247, 174, 106, and 68 kcal/mole, respectively. The atomization energies of SiC, Si2C, and SiC2 have been redetermined.

Anions in laser-induced plasmas

“…[92,93]). The other spectroscopic constants were calculated by means of (5.2) and (5.3) with the experimental value of D 0 0 ðSiCÞ ¼ 4:66 eV from [94]. It should be noted that all the electronic states listed above dissociate into the same atomic state (higher states dissociate into a different atomic state that have a higher energy).…”

Double Aromaticity in Monocyclic Carbon, Boron, and Borocarbon Rings Based on Magnetic Criteria

“…Boron carbide [90][91][92][93][94][95][96][97][98][99][100][101][102] is one of the hardest materials known and has a number of important uses. Diatomic and larger BC clusters have been studied by using mass spectrometry [103,104] and EPR. [105][106][107] Other studies have probed the structure of B n C m (n + m = 2-5) clusters.…”

The Molecular Structure and Ionization Potential of Si2: The Role of the Excited States in the Photoionization of Si2

“…[1][2][3][4][5][6][7][8][9][10][11] The discovery of emissive nanometer-scale silicon clusters has further heightened this interest. 3 Fundamental to the buildup of nanometer-size silicon clusters is an understanding of the underlying silicon-silicon interactions existing in the cluster which, to first order, are strongly influenced by the nature of the two-body Si-Si interaction (i.e., the silicon dimer bond).…”