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2696-92-6

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Basic Information
CAS No.: 2696-92-6
Name: Nitrosyl chloride
Article Data: 284
Molecular Structure:
Molecular Structure of 2696-92-6 (Nitrosyl chloride)
Formula: ClN O
Molecular Weight: 65.4591
Synonyms: Nitrosylchloride (8CI);Chlorine nitride oxide (ClNO);Nitrogen oxide chloride (NOCl);Nitrogen oxychloride;Nitrogen oxychloride (NOCl);Nitrosochloride;Nitrosoniumchloride;
EINECS: 220-273-1
Density: 1.54g/cm3
Melting Point: -59.6°C
Boiling Point: °Cat760mmHg
Flash Point: °C
Solubility: decomposes in H2O; soluble fuming H2SO4 [HAW93]
Hazard Symbols: Strong irritant, especially to lungs and mucous membranes.
Risk Codes: R36/37/38
Safety: Poison by inhalation and ingestion. A corrosive irritant to skin, eyes, and mucous membranes. Inhalation may cause pulmonary edema and hemorrhage. Potentially explosive reaction with acetone + platinum. Mixtures with hydrogen + oxygen ignite spontaneously. When heated to decomposition it emits very toxic fumes of Cl and NOx.
PSA: 29.43000
LogP: 0.90660
Synthetic route
7783-99-5

silver(I) nitrite

7719-09-7

thionyl chloride

A

2696-92-6

nitrosylchloride

B

silver(I) chloride

Conditions
ConditionsYield
In diethyl ether byproducts: SO2; to finely ground dry Ag salt in anhyd. Et2O cooled to 0°C added dropwise with vigorous stirring equimolar amt. of thionyl chloride; suspn. stirred for 15 min; soln. was decanted from AgCl; AgCl dried; soln. washed (Et2O); all extracts combined; cooled to 0°C;A n/a
B 99%
7719-09-7

thionyl chloride

silver nitrate

A

Nitryl chloride

B

2696-92-6

nitrosylchloride

C

silver(I) chloride

Conditions
ConditionsYield
In diethyl ether byproducts: SO2, SO3; to finely ground dry Ag salt in anhyd. Et2O cooled to 0°C added dropwise with vigorous stirring equimolar amt. of thionyl chloride; suspn. stirred for 15 min; soln. was decanted from AgCl; AgCl dried; soln. washed (Et2O); all extracts combined; cooled to 0°C;A n/a
B n/a
C 99%
10026-04-7, 53609-55-5

tetrachlorosilane

10102-44-0

Nitrogen dioxide

B

Nitryl chloride

C

2696-92-6

nitrosylchloride

Conditions
ConditionsYield
In neat (no solvent) heating (molar ratio SiCl4:NO2 1:5.6, 353 K); mass spectrometry, chromy.;A 98.5%
B n/a
C n/a
In neat (no solvent) heating (molar ratio SiCl4:NO2 1:6.0, 313 K); mass spectrometry, chromy.;A 98.3%
B n/a
C n/a
In neat (no solvent) heating (molar ratio SiCl4:NO2 1:6.8, 313 K); mass spectrometry, chromy.;A 98.5%
B n/a
C n/a
In neat (no solvent) heating (molar ratio SiCl4:NO2 1:5.2, 313 K); mass spectrometry, chromy.;A 95.5%
B n/a
C n/a
In neat (no solvent) heating (molar ratio SiCl4:NO2 1:6, 298 K, exclusion of air, 180 h), heating 313-333 K, 8-10 h); distn. of gasous products; mass spectrometry, chromy.;

trans-hydroxotetraamminenitrosoruthenium(II)

7697-37-2

nitric acid

trans-tetraamminenitratonitrosoruthenium(III) nitrate

B

7732-18-5

water

C

10102-44-0

Nitrogen dioxide

D

2696-92-6

nitrosylchloride

E

10024-97-2

dinitrogen monoxide

Conditions
ConditionsYield
In nitric acid byproducts: Cl2; to Ru complex was added concd. HNO3; mixt. heated under reflux for 5 min; cooled to room temp.; ppt. filtered off; washed (water, alc., ether); dried (vac.); recrystd. (aq. HNO3); elem. anal.;A 95%
B n/a
C n/a
D n/a
E n/a
10241-05-1

molybdenum(V) chloride

10102-43-9

nitrogen(II) oxide

75-05-8

acetonitrile

A

65060-56-2

Mo(NO)Cl3(NCMe)2

B

2696-92-6

nitrosylchloride

Conditions
ConditionsYield
In dichloromethane NO was bubbled through the soln. of MoCl5 and CH3CN at room temp. for 1h, Ar atm.; concn., pptn. with pentane, filtration, washing with pentane, drying invac.; elem. anal.;A 70%
B n/a

trans-hydroxotetraamminenitrosoruthenium(II)

7697-37-2

nitric acid

A

fac-diamminetrinitratonitrosoruthenium(III)

B

7732-18-5

water

C

2696-92-6

nitrosylchloride

D

10024-97-2

dinitrogen monoxide

Conditions
ConditionsYield
In nitric acid byproducts: Cl2; to Ru complex was added concd. HNO3; mixt. heated under reflux for 50 min; cooled to room temp.; ppt. filtered off; washed (water, alc., ether); dried (vac.); mother liquor evapd. on water bath; ppt. was obtained; elem.anal.;A 65%
B n/a
C n/a
D n/a
10026-04-7, 53609-55-5

tetrachlorosilane

10102-44-0

Nitrogen dioxide

B

7782-50-5

chlorine

C

Nitryl chloride

D

2696-92-6

nitrosylchloride

Conditions
ConditionsYield
In neat (no solvent) heating (molar ratio SiCl4:NO2 1:4.8, 313 K); mass spectrometry, chromy.;A 62%
B <1
C n/a
D n/a
In neat (no solvent) heating (molar ratio SiCl4:NO2 1:5.6, 293 K); mass spectrometry, chromy.;A 51%
B <1
C n/a
D n/a
10102-43-9

nitrogen(II) oxide

13283-01-7

tungsten(VI) chloride

92542-39-7

trichlorotrinitrosyltungsten

B

2696-92-6

nitrosylchloride

Conditions
ConditionsYield
In dichloromethane mixt. of WCl6 and CH2Cl2 under N2 was stirred at room temp., N2 was replaced by NO for 30 min, NO was flushed out of system, mixt. was refluxedunder N2 for 3.5 h to removed ClNO; filtered, washed with CH2Cl2, dried under vac. at ambient temp.; elem. anal.;A 61%
B n/a
10102-43-9

nitrogen(II) oxide

13283-01-7

tungsten(VI) chloride

92473-06-8

W(NO)2Cl4

B

2696-92-6

nitrosylchloride

Conditions
ConditionsYield
In dichloromethane mixt. of WCl6 and CH2Cl2 under N2 was stirred at room temp., N2 was replaced by NO for 17 min, NO was flushed out of system, mixt. was refluxedunder N2 for 3.5 h to removed ClNO; filtered, washed with CH2Cl2, dried under vac. at ambient temp.; elem. anal.;A 47%
B n/a
7697-37-2

nitric acid

7647-14-5

sodium chloride

2696-92-6

nitrosylchloride

Conditions
ConditionsYield
In neat (no solvent) HNO3 : NaCl = 3:1; at 100°C about 3 h;;35%
In neat (no solvent) HNO3 : NaCl = 3:1; at 100°C about 3 h;;35%
In water using concd. HNO3;;
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Chemistry

Product Name: Nitrosyl chloride (CAS NO.2696-92-6)


Molecular Formula: ClNO
Molecular Weight: 65.4591g/mol
Mol File: 2696-92-6.mol
EINECS: 220-273-1
Density: 1.54 g/cm3
Surface Tension: 42.6 dyne/cm
Enthalpy of Vaporization: 25.78 kJ/mol
Vapour Pressure: 2180 mmHg at 25°C
XLogP3-AA: 0.7
H-Bond Donor: 0
H-Bond Acceptor: 2
Structure Descriptors of Nitrosyl chloride (CAS NO.2696-92-6):
  IUPAC Name: nitrosyl chloride
  Canonical SMILES: N(=O)Cl
  InChI: InChI=1S/ClNO/c1-2-3 
  InChIKey: VPCDQGACGWYTMC-UHFFFAOYSA-N

Production

 NOCl can be prepared by the direct combination of chlorine and nitric oxide. Alternatively, nitrosylsulfuric acid and HCl also affords the compound:
HCl + NOHSO4 → NOCl + H2SO4
It also arises from the combination of hydrochloric and nitric acids according to the following reaction:
HNO3 + 3 HCl → Cl2 + 2 H2O + NOCl
Although this mixture was used for dissolving gold for a long time the first description of the gas was done by Edmund Davy in 1831.

Consensus Reports

Reported in EPA TSCA Inventory.

Safety Profile

Poison by inhalation and ingestion. A corrosive irritant to skin, eyes, and mucous membranes. Inhalation may cause pulmonary edema and hemorrhage. Potentially explosive reaction with acetone + platinum. Mixtures with hydrogen + oxygen ignite spontaneously. When heated to decomposition it emits very toxic fumes of Cl and NOx.
Safety Information of Nitrosyl chloride (CAS NO.2696-92-6):
Hazard Codes: CCorrosive,TToxic
RIDADR: 1069
Hazard Note: Toxic/Corrosive
HazardClass: 2.3

Standards and Recommendations

DOT Classification:  2.3; Label: Poison Gas, Corrosive

Specification

 Nitrosyl chloride , its CAS NO. is 2696-92-6, the synonyms are EINECS 220-273-1 ; HSDB 849 ; Nitrogen chloride oxide (nocl) ; Nitrogen oxychloride (NOCl) ; Nitrosonium chloride ; Nitrosyl chloride ((NO)Cl) .