Dichlorosilylene

Formula: Cl₂Si
Molecular weight: 98.992
CAS Registry Number: 13569-32-9
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Other data available:
Data at other public NIST sites:
- Computational Chemistry Comparison and Benchmark Database
- Gas Phase Kinetics Database
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Gas phase ion energetics data

Data compiled as indicated in comments:
LBLHLM - Sharon G. Lias, John E. Bartmess, Joel F. Liebman, John L. Holmes, Rhoda D. Levin, and W. Gary Mallard
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
B - John E. Bartmess

View reactions leading to Cl₂Si⁺ (ion structure unspecified)

Electron affinity determinations

EA (eV)	Method	Reference	Comment
0.77 ± 0.13	EIAE	Pabst, Margrave, et al., 1977	From SiCl₄; G3MP2B3 calculations indicate an EA of ca. 1.2 eV; B
>2.51512	EIAE	Jaeger and Henglein, 1968	From SiCl₄; G3MP2B3 calculations indicate an EA of ca. 1.2 eV; B

Ionization energy determinations

IE (eV)	Method	Reference	Comment
10.93 ± 0.10	EI	Ihle, Wu, et al., 1978	LLK
10.35	PE	Bock, Solouki, et al., 1985	Vertical value; LBLHLM
10.35	PE	Bock, Solouki, et al., 1985	Vertical value; LBLHLM

Appearance energy determinations

Ion	AE (eV)	Other Products	Method	Reference	Comment
ClSi⁺	12.50 ± 0.10	Cl	EI	Ihle, Wu, et al., 1978	LLK

References

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Pabst, Margrave, et al., 1977
Pabst, R.E.; Margrave, J.L.; Franklin, J.L., Electron impact studies of the tetrachlorides and tetrabromides of silicon and germanium, Int. J. Mass Spectrom. Ion Phys., 1977, 25, 361. [all data]

Jaeger and Henglein, 1968
Jaeger, K.; Henglein, A., Die Bildung negativer Ionen aus SiCl₄ und organischen Siliciumchloriden durch Elektronenstoss, Z. Naturfor., 1968, 23A, 1122. [all data]

Ihle, Wu, et al., 1978
Ihle, H.R.; Wu, C.H.; Miletic, M.; Zmbov, K.F., Mass spectrometric studies of gas species in the systems Si-Cl and Si-Li, Adv. Mass Spectrom., 1978, 7, 670. [all data]

Bock, Solouki, et al., 1985
Bock, H.; Solouki, B.; Maier, G., SiCl₂: Photoelektronenspektroskopische Optimierung verschiedener Synthesen, Angew. Chem., 1985, 97, 205. [all data]

Notes

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Symbols used in this document:

AE Appearance energy

EA Electron affinity
Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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