Molecular and ionic phases of solid nitrosyl chloride at low temperature

Journal Article · Thu Nov 16 00:00:00 EST 1989 · Journal of Physical Chemistry; (USA)

DOI:https://doi.org/10.1021/j100360a041· OSTI ID:6986014

Killough, P M; Swanson, B I; Agnew, S F ^[1]

---

1. Los Alamos National Lab., NM (USA)

The discovery of two solid phases of nitrosyl chloride is reported. ONCl-II is stable in the range 85-203 K and is composed of dimers of the ONCl molecule. The absence of the NO stretch in this phase from 136 to 203 K is caused by dephasing due to thermal occupation of a torsional mode of the dimer, which appears at 117 cm{sup {minus}1} and is not observed over the same temperature range. Within the molecular phase, dramatic softening of both the N-Cl stretch and ONCl bend occurs as temperature is reduced. ONCl-I is stable over the range 13-85 K and represents an ionic phase of ONCl with at least 2 NO{sup +}Cl{sup {minus}}/primitive unit. The transition from ONCl-II to ONCl-I is first order with substantial hysteresis and is accompanied by the coalescence of intra- and intermolecular N-Cl modes.

• OSTI ID: 6986014
• Journal Information: Journal of Physical Chemistry; (USA), Vol. 93:23; ISSN 0022-3654
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
NITROSO COMPOUNDS
PHASE STUDIES
CHLORIDES
DATA ANALYSIS
EXPERIMENTAL DATA
MEASURING INSTRUMENTS
MEASURING METHODS
SOLIDS
CHLORINE COMPOUNDS
DATA
HALIDES
HALOGEN COMPOUNDS
INFORMATION
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
400000* - Chemistry
400200 - Inorganic
Organic
& Physical Chemistry