G. Pimentel

Publications70
h-index28
Citations2,504
Highly Influential Citations17
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Evidence for Solid Carbon Dioxide in the Upper Atmosphere of Mars
The infrared spectra recorded by Mariner 6 and 7 show reflections at 4.3 microns. which suggest the presence of solid carbon dioxide in the upper atmosphere of Mars.
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Correlation of Infrared Stretching Frequencies and Hydrogen Bond Distances in Crystals
Empirical correlations between X–H≡Y distance R and frequency shift of the X–H stretching motion Δv are presented for O–H≡O, N–H≡O, and N–H≡N hydrogen bonds. A linear correlation is possible provided… Expand
  • 192
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Infrared Absorptions near Three Microns Recorded over the Polar Cap of Mars
During the Mariner 7 flyby of Mars, the infrared spectrometer recorded distinct, sharp absorption. near 3020 and 3300 reciprocal centimeters between 61�S and 80�S. at the edge of the southern polar… Expand
  • 67
  • 4
Infrared Spectrum and Vibrational Potential Function of Ketene and the Deuterated Ketenes
Infrared spectra of solid ketene and ketene in argon reveal a new fundamental at lower frequency (CH2CO, 438 cm—1; CD2CO, 371 cm—1; CHDCO, 398 cm—1) than any previously reported. These spectra and… Expand
  • 161
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2.5-km Low-Temperature Multiple-Reflection Cell.
A low-temperature multiple-pass White cell is described which can be operated at any temperature between 120 K and room temperature. The path length can be varied from 60 m up to 2540 m in 80-m… Expand
  • 65
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Martian topography from the Mariner 6 and 7 infrared spectra
Mars topography from Mariner 6 and 7 IR spectra, discussing geographical resolution, surface carbon dioxide pressure, depressions, ridges and valleys
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Infrared Spectrum and Vibrational Assignment for Chlorine Monoxide, Cl2O
Infrared studies of chlorine monoxide (16O and 18O) in the region 200–4000 cm−1 for both gas and condensed phases are presented. The spectra require reassignment of the stretching fundamentals and… Expand
  • 37
  • 1
Hydrogen Bonding and Electronic Transitions: The Role of the Franck-Condon Principle
  • 122
The Bonding of Trihalide and Bifluoride Ions by the Molecular Orbital Method
A simple molecular orbital treatment is presented to explain the bonding in trihalide ions, X3−, XY2−, and XYZ−, and bifluoride ion, HF2−. The M.O.'s are formed from linear combinations of npσ… Expand
  • 420
Krypton Fluoride: Preparation by the Matrix Isolation Technique
A method is described for the preparation of KrF/sub 2/ by the photolysis of fluorine suspended in a solid mixture of argon and krypton at 20 deg K. This experimental method is called the matrix… Expand
  • 124