Water pentamer

Cruzan J D, Viant M R, Brown M G, Luoas D D, Liu Kand Saykaiiy R J 1998 Terahertz iaser vibration-rotation-tunneiing speotrum of the water pentamer-d(IO). Constraints on the bifuroation tunneiing dynamios Chem. Phys. Lett. 292 667-76... 

Liu K, Brown M G, Cruzan J D and Saykally R J 1996 Vibration-rotation tunnelling speotra of the water pentamer Science 271 62-4... 

Figure 5.30 Alternative water pentamer isomers having partial anticooperativity, (a)-(c), or higher coordination and ring strain, (d). Labels in (a)-(c) correspond to clockwise monomer numbering from the top (see the text). (Species (a)-(c) have been optimized under the constraint of planar equilateral skeletal geometry to prevent rearrangement to Wsc [Fig. 5.29(a)] and are therefore only near-stationary points on the potential-energy surface.)...

Recent advances in spectroscopic methods have enabled the water pentamer to be studied experimentally. Infrared cavity ringdown spectroscopy has been used to examine the intramolecular absorption features of the gas-phase water pentamer, which match the spectral features of the pentamer rings in liquid water and amorphous ice (Paul et al., 1999 Burnham et al., 2002). Vibration Rotation Tunnelling (VRT) spectroscopy has been used to provide a more direct probe of the water pentamer intermolecular vibrations and fine structure in liquid water (Liu et al., 1997 Harker et al., 2005). The water pentamer was found to average out... 

Figure 4. Water pentamer with four water molecules hydrogen bonded to a central water molecule (redrawn from Walrafen s (1973) diagram).

K. Liu., M.G. Brown and R.J. Saykally, Terahertz laser vibration-rotationtunneling spectroscopy and dipole moment of a cage form of the water hexamer, J. Phys. Chem. A, 101 (1997) 8995-9010 K. Liu., M.G. Brown, J.D. Cruzan and R.J. Saykally, Terahertz laser spectroscopy of the water pentamer structure and hydrogen bond rearrangement dynamics, J. Phys. Chem. A, 101 (1997) 9011-9021. 

Ab initio studies of anionic clusters of water pentamer ... 

Plummer PM, Chen T (1987) Investigation of structure and stability of small clusters molecular dynamics studies of water pentamers. J Chem Phys 86(12) 7149-7155... 

Rotation Tunneling Spectra of the Water Pentamer Structure and Dynamics. 

Liu, K., Brown, M. G., Cruzan, J. D., Saykally, R. J. (1996a). Vibration-rotation tunneling spectra of the water pentamer Structure and dynamics. Science, 271, 62-64. 

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