Comments on the structure of 1,2-dichloroethane and N<sub>2</sub>O<sub>2</sub>

Lipscomb, W.N.; Wang, F.E.; May, W.R.; Lippert, E.

doi:10.1107/s0365110x61003259

Cited by 106 publications

(53 citation statements)

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“…These features are separated by ∼2.3 Å, which is very close to the N-N bond length of the dimer in the condensed phase, which is 2.18 Å. 17 These images might correspond to the dimers characterized in the multilayer. 1,6 Heating the system to 65 K for 30 min results in a loss of the three-dimensional character of the clusters.…”

Section: No Clusters and Multilayer Dimers At Low Temperaturementioning

confidence: 96%

Direct Molecular Imaging of NO Monomers and Dimers and a Surface Reaction on Ag{111}

and

King

2001

J. Phys. Chem. B

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Molecular and atomic resolution STM images are presented of NO monomers and dimers and the reaction products of the dimer thermal decomposition, N 2 O and O, on a Ag{111} surface. The weakly chemisorbed NO monomer is formed at low coverages and temperatures between 4 and 65 K and is imaged as a 0.25 Å deep depression. Continued adsorption leads to multilayer dimer cluster formation at 4 K and smoother multilayer dimer packing at 65 K, with imaging of each component of some of the dimers in the top layer. Removal of the multilayer by evacuation or heating leaves the dimer chemisorbed layer, where each dimer is imaged as a protrusion. Large domains of four different ordered phases are present, which we designate as R, , , and δ. This layer is quite stable at 65 K. Images including clean patches of Ag{111} showing atomic resolution of the top Ag layer enable us to present structures for each of the dimer phases, with full site assignments. The dimers are adsorbed across bridge sites at low coverage and across bridge and an atop to 3-fold site at the highest coverage, 0.25 ML. On heating to 105 K, the dimer phases are largely converted to two new ordered phases, each of which is a mixed N 2 O + O phase. Some residue of the (NO) 2 phase remains, however, indicating that it is the least reactive phase. A mechanism for the dissociation involving thermal excitation of the hindered NO rotation about the N-N axis is consistent with the reactant-to-product image sequences. Further heating to 125 K invokes N 2 O desorption, leaving a residual silver oxide ring structure, which is a precursor to the stable Ag{111}-p(4×4)-oxide structure.

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Section: No Clusters and Multilayer Dimers At Low Temperaturementioning

confidence: 96%

Direct Molecular Imaging of NO Monomers and Dimers and a Surface Reaction on Ag{111}

and

King

2001

J. Phys. Chem. B

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“…͓DOI: 10.1063/1.1459702͔ NO is an important molecule in a wide range of atmospheric and biological processes, and as a result the reactivity of the NO dimer, ͑NO͒ 2 , has been of interest since the 1950s. [1][2][3] NO is an open shell molecule, so the formation of the dimer involves the formation of a bond from the unpaired electron of each NO monomer. This bond is stronger than is usual for a typical van der Waals molecule.…”

mentioning

confidence: 99%

Direct measurement of the binding energy of the NO dimer

Wade

Cline

Lorenz

et al. 2002

The Journal of Chemical Physics

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Section: The 5 Transition: Measurement Of the Predissociation Timementioning

confidence: 99%

“…[1] where a Boltzmann equilibrium at T ROT ϭ 4 K was systematically assumed. Therefore this means that the rotational temperature was considered as equal for both 1 and 5 vibrational transitions. The profile introduced for each of the rotational components was a Lorentz profile assumed to take its origin in the finite lifetime of the v 5 ϭ 1 level.…”

Section: The 5 Transition: Measurement Of the Predissociation Timementioning

confidence: 99%

The NO Dimer: Jet-Cooled Study of ν1and ν5Transitions

Asselin

Soulard

Lacome

1998

Journal of Molecular Spectroscopy

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Comments on the structure of 1,2-dichloroethane and N₂O₂

Cited by 106 publications

References 1 publication

Direct Molecular Imaging of NO Monomers and Dimers and a Surface Reaction on Ag{111}

Direct Molecular Imaging of NO Monomers and Dimers and a Surface Reaction on Ag{111}

Direct measurement of the binding energy of the NO dimer

The NO Dimer: Jet-Cooled Study of ν1and ν5Transitions

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Comments on the structure of 1,2-dichloroethane and N2O2

Cited by 106 publications

References 1 publication

Direct Molecular Imaging of NO Monomers and Dimers and a Surface Reaction on Ag{111}

Direct Molecular Imaging of NO Monomers and Dimers and a Surface Reaction on Ag{111}

Direct measurement of the binding energy of the NO dimer

The NO Dimer: Jet-Cooled Study of ν1and ν5Transitions

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Comments on the structure of 1,2-dichloroethane and N₂O₂