Novel Pentacoordinate Siliconium Complexes Stabilized by Oxygen and Nitrogen Donors: Highly Sensitive and Unusual Equilibrium between Ionic Penta- and Neutral Hexacoordinate Compounds

Daniel Kost; Vijeyakumar Kingston; Inna Kalikhman

doi:10.1002/9783527619924.ch10

Novel Pentacoordinate Siliconium Complexes Stabilized by Oxygen and Nitrogen Donors: Highly Sensitive and Unusual Equilibrium between Ionic Penta- and Neutral Hexacoordinate Compounds

Daniel Kost, Vijeyakumar Kingston, Inna Kalikhman

Department of Chemistry

Research output: Chapter in Book/Report/Conference proceeding › Chapter › peer-review

Abstract

The first ionic dissociation of the Si–Cl bond in neutral hexacoordinate silicon complexes is reported. An equilibrium reaction between the ionic siliconium chloride and its neutral precursor (dissociation-recombination) is observed. The population ratio can be controlled by temperature or by replacement of the chloro ligand by a triflate group. The reaction enthalpy and entropy of the dissociation are both negative, suggesting that solvent organization facilitates dissociation at low temperature.

Original language	English
Title of host publication	Organosilicon Chemistry V
Subtitle of host publication	From Molecules to Materials
Publisher	wiley
Pages	55-60
Number of pages	6
ISBN (Electronic)	9783527619924
ISBN (Print)	3527306706, 9783527306701
DOIs	https://doi.org/10.1002/9783527619924.ch10
State	Published - 1 Jan 2008

Keywords

Equilibrium reaction
Ionic dissociation
Negative entropy
Neutral hexacoordinate complexes
Siliconium compounds

ASJC Scopus subject areas

General Chemistry

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10.1002/9783527619924.ch10

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title = "Novel Pentacoordinate Siliconium Complexes Stabilized by Oxygen and Nitrogen Donors: Highly Sensitive and Unusual Equilibrium between Ionic Penta- and Neutral Hexacoordinate Compounds",

abstract = "The first ionic dissociation of the Si–Cl bond in neutral hexacoordinate silicon complexes is reported. An equilibrium reaction between the ionic siliconium chloride and its neutral precursor (dissociation-recombination) is observed. The population ratio can be controlled by temperature or by replacement of the chloro ligand by a triflate group. The reaction enthalpy and entropy of the dissociation are both negative, suggesting that solvent organization facilitates dissociation at low temperature.",

keywords = "Equilibrium reaction, Ionic dissociation, Negative entropy, Neutral hexacoordinate complexes, Siliconium compounds",

author = "Daniel Kost and Vijeyakumar Kingston and Inna Kalikhman",

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year = "2008",

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doi = "10.1002/9783527619924.ch10",

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Novel Pentacoordinate Siliconium Complexes Stabilized by Oxygen and Nitrogen Donors: Highly Sensitive and Unusual Equilibrium between Ionic Penta- and Neutral Hexacoordinate Compounds. / Kost, Daniel; Kingston, Vijeyakumar; Kalikhman, Inna.
Organosilicon Chemistry V: From Molecules to Materials. wiley, 2008. p. 55-60.

Research output: Chapter in Book/Report/Conference proceeding › Chapter › peer-review

TY - CHAP

T1 - Novel Pentacoordinate Siliconium Complexes Stabilized by Oxygen and Nitrogen Donors

T2 - Highly Sensitive and Unusual Equilibrium between Ionic Penta- and Neutral Hexacoordinate Compounds

AU - Kost, Daniel

AU - Kingston, Vijeyakumar

AU - Kalikhman, Inna

PY - 2008/1/1

Y1 - 2008/1/1

N2 - The first ionic dissociation of the Si–Cl bond in neutral hexacoordinate silicon complexes is reported. An equilibrium reaction between the ionic siliconium chloride and its neutral precursor (dissociation-recombination) is observed. The population ratio can be controlled by temperature or by replacement of the chloro ligand by a triflate group. The reaction enthalpy and entropy of the dissociation are both negative, suggesting that solvent organization facilitates dissociation at low temperature.

AB - The first ionic dissociation of the Si–Cl bond in neutral hexacoordinate silicon complexes is reported. An equilibrium reaction between the ionic siliconium chloride and its neutral precursor (dissociation-recombination) is observed. The population ratio can be controlled by temperature or by replacement of the chloro ligand by a triflate group. The reaction enthalpy and entropy of the dissociation are both negative, suggesting that solvent organization facilitates dissociation at low temperature.

KW - Equilibrium reaction

KW - Ionic dissociation

KW - Negative entropy

KW - Neutral hexacoordinate complexes

KW - Siliconium compounds

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U2 - 10.1002/9783527619924.ch10

DO - 10.1002/9783527619924.ch10

M3 - Chapter

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SN - 9783527306701

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EP - 60

BT - Organosilicon Chemistry V

PB - wiley

ER -

Novel Pentacoordinate Siliconium Complexes Stabilized by Oxygen and Nitrogen Donors: Highly Sensitive and Unusual Equilibrium between Ionic Penta- and Neutral Hexacoordinate Compounds

Abstract

Keywords

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