Abstract
The reactions of laser ablated manganese and rhenium metal atoms with silane molecules in low temperature argon matrix were studied. The experimental and theoretical results indicate that the reaction happened after the metal atoms were excited to Mn(6P) or Re(6P) excited states upon photolysis. Combining the isotopic shifts of the infrared absorptions and quantum chemical calculations, the silyl metal hydride HMnSiH3 and the silylidyne H3ReSiH were identified in the argon matrix. The vibronic coupling between the ground state X2A' and the first excited state A2A'' leads to a bond angle H-Si-Re of 130.4° in the doublet ground state H3ReSiH.
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