Gas-Phase Experiments with Dihydrogen-Bonded Complexes

GAS-PHASE EXPERIMENTS WITH DIHYDROGEN-BONDED COMPLEXES 

Whereas theoretical studies of dihydrogen bonding where dihydrogen-bonded complexes are isolated, approximating the gas phase, are very numerons, gas-phase experiments with these complexes are relatively rare. This circumstance is probably connected with the nontrivial experimental techniqnes used for gas-phase investigations. 

The first data on gas-phase complexes formed between strong acids and the methane molecnle were reported by Barnes in 1983 [15]. The author observed a CH4 HCI complex in a rare gas matrix that was assigned to a van der Waals system. Its C 3v structure has also been confirmed by gas-phase microwave spectroscopy [16]. Other complexes, snch as CH4 HCN, CH4 HF, and CHj HBr, were reported later [17]. Since these complexes represent C-H- H interactions, then-nature is discussed in Chapter 6. 

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