(HCN) m(NH 3) nH + clusters formed by the reaction of carbon vapor with jet-cooled ammonia

New cluster species of the type (HCN) m (NH 3) n H + with m up to 4 and n up to 7 alongwith (NH 3) n H + species are observed using mass spectrometry, on the reaction of carbon vapor with jet-cooled NH 3 in admixture with helium. The most preponderant species correspond to m=1 and 2, viz. (HCN) 1(NH...

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Bibliographic Details
Published in:Chemical physics letters 2003-04, Vol.372 (1), p.121-127
Main Authors: Raina, G., Kulkarni, G.U., Rao, C.N.R.
Format: Article
Language:English
Subjects:
Atomic and molecular clusters
Atomic and molecular physics
Exact sciences and technology
Physics
Spectroscopy and geometrical structure of clusters
Studies of special atoms, molecules and their ions
clusters
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Summary:New cluster species of the type (HCN) m (NH 3) n H + with m up to 4 and n up to 7 alongwith (NH 3) n H + species are observed using mass spectrometry, on the reaction of carbon vapor with jet-cooled NH 3 in admixture with helium. The most preponderant species correspond to m=1 and 2, viz. (HCN) 1(NH 3) 4H +, (HCN) 1(NH 3) 3H + and (HCN) 2(NH 3) 3H +. These clusters involving the tetrahedral coordination in the first solvation shell of the NH 4 + ion are the most stable species, as corroborated by molecular-orbital calculations. The incremental complexation energy due to successive addition of the NH 3 molecule to (HCN)(NH 3) n H +, decreases monotonically with increasing n, for n>2.
ISSN:0009-2614
1873-4448
DOI:10.1016/S0009-2614(03)00375-0