The present study addresses the problem of establishing from fully ab initio quantum methods some quantitative features of the chemical interactions which play an important role in the ionic lithium chemistry of astrophysical relevance. In particular, the LiH2+ energetics is examined by looking at the various possible chemical channels producing LiH, LiH+, H-2 and H-2(+). An accurate evaluation of the relative energy landscapes as the complex breaks up into its asymptotic partners is presented for the first time. It allows us to clearly select those reactive pathways which can be excluded when setting up a kinetic modeling of the lithium chemistry network in early universe processes. (C) 2001 Elsevier Science B.V. All rights reserved.
Possible reaction paths in the LiH2+ chemistry: a computational analysis of the interaction forces / Gianturco, Francesco Antonio; Bodo, Enrico; R., Martinazzo; M., Raimondi. - In: CHEMICAL PHYSICS. - ISSN 0301-0104. - STAMPA. - 271:(2001), pp. 309-321. [10.1016/S0301-0104(01)00424-4]
Possible reaction paths in the LiH2+ chemistry: a computational analysis of the interaction forces
GIANTURCO, Francesco Antonio;BODO, Enrico;
2001
Abstract
The present study addresses the problem of establishing from fully ab initio quantum methods some quantitative features of the chemical interactions which play an important role in the ionic lithium chemistry of astrophysical relevance. In particular, the LiH2+ energetics is examined by looking at the various possible chemical channels producing LiH, LiH+, H-2 and H-2(+). An accurate evaluation of the relative energy landscapes as the complex breaks up into its asymptotic partners is presented for the first time. It allows us to clearly select those reactive pathways which can be excluded when setting up a kinetic modeling of the lithium chemistry network in early universe processes. (C) 2001 Elsevier Science B.V. All rights reserved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.