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Hydrogen Bonding to Multifunctional Molecules: Spectroscopic and ab Initio Investigation of 4-Ethynylbenzonitrile-(Water)(1-3) Complexes

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Title Hydrogen Bonding to Multifunctional Molecules: Spectroscopic and ab Initio Investigation of 4-Ethynylbenzonitrile-(Water)(1-3) Complexes
 
Creator MAITY, S
PATWARI, GN
 
Subject ultraviolet double-resonance
water complexes
clusters
phenylacetylene
benzene
uv
 
Description The water complexes of 4-ethynylbenzonitrile (4EBzN) were investigated with IR-UV double resonance spectroscopy. Water interacts with the pi electron density of the C N group in 4EBzN, leading to the formation of a quasiplanar cyclic complex incorporating C-H center dot center dot center dot O and O-H center dot center dot center dot pi hydrogen bonds. The (H(2)O)(2) and (H(2)O)(3) complexes of 4EBzN are characterized by the presence of hydrogen bonding bridges between the hydrogen bond donor (aromatic C-H group) and acceptor (C N group) sites present in 4EBzN. The present structures of the water complexes are similar to the corresponding complexes of benzonitrile but are drastically different from water complexes of phenylacetylene and fluorophenylacetylenes. The infrared spectra in the O-H stretching region indicate that the stability of all the water complexes of 4EBzN is lower than that of the corresponding complexes of benzonitrile, which can be attributed to the mild electron withdrawing ability of the ethynyl group present in the para position relative to the nitrile group. Hierarchally, the C N group has the higher propensity to form hydrogen bonding relative to the acetylenic group and the benzene ring in 4EBzN.
 
Publisher AMER CHEMICAL SOC
 
Date 2011-07-14T07:02:25Z
2011-12-26T12:48:15Z
2011-12-27T05:47:15Z
2011-07-14T07:02:25Z
2011-12-26T12:48:15Z
2011-12-27T05:47:15Z
2010
 
Type Article
 
Identifier JOURNAL OF PHYSICAL CHEMISTRY A, 114(32), 8337-8344
1089-5639
http://dx.doi.org/10.1021/jp105081f
http://dspace.library.iitb.ac.in/xmlui/handle/10054/3889
http://hdl.handle.net/10054/3889
 
Language en