The basicity of [tris-(trimethylphosphine)(cyclooctadiene)iridium(I)]

Joseph S. Merola; Marion A. Franks

doi:10.1016/j.jorganchem.2012.09.020

The basicity of [tris-(trimethylphosphine)(cyclooctadiene)iridium(I)]

Joseph S. Merola, Marion A. Franks

Virginia Tech

Research output: Contribution to journal › Article › peer-review

Abstract

[Tris-(trimethylphosphine)(cyclooctadiene)iridium(I)]chloride, [Ir(COD)(PMe₃)₃]Cl, is very electron rich. In this report, that electron rich character is probed by examining the protonation of the complex at the metal center to form the dicationic [tris-(trimethylphosphine) (cyclooctadiene)(hydrido)iridium(III)], [HIr(COD)(PMe₃) ₃]⁺². The exact formulation of the species formed depends on the nature of the Bronsted acid's counterion. Protonation with hydrogen chloride, fluoroboric acid, and triflic acid are all described and the structure of the dication and some products from further reaction of the dication are elucidated. Simple aqueous acid/base titration of [Ir(COD)(PMe₃) ₃]Cl is described yielding a pK_a for [HIr(COD)(PMe ₃)₃]⁺² of 4.2.

Original language	English
Pages (from-to)	49-55
Number of pages	7
Journal	Journal of Organometallic Chemistry
Volume	723
DOIs	https://doi.org/10.1016/j.jorganchem.2012.09.020
State	Published - Jan 1 2013
Externally published	Yes

Keywords

Iridium
Iridium hydride
Iridium phosphine
Metal basicity
Protonation
Trimethylphosphine

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10.1016/j.jorganchem.2012.09.020

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title = "The basicity of [tris-(trimethylphosphine)(cyclooctadiene)iridium(I)]",

abstract = "[Tris-(trimethylphosphine)(cyclooctadiene)iridium(I)]chloride, [Ir(COD)(PMe3)3]Cl, is very electron rich. In this report, that electron rich character is probed by examining the protonation of the complex at the metal center to form the dicationic [tris-(trimethylphosphine) (cyclooctadiene)(hydrido)iridium(III)], [HIr(COD)(PMe3) 3]+2. The exact formulation of the species formed depends on the nature of the Bronsted acid's counterion. Protonation with hydrogen chloride, fluoroboric acid, and triflic acid are all described and the structure of the dication and some products from further reaction of the dication are elucidated. Simple aqueous acid/base titration of [Ir(COD)(PMe3) 3]Cl is described yielding a pKa for [HIr(COD)(PMe 3)3]+2 of 4.2.",

keywords = "Iridium, Iridium hydride, Iridium phosphine, Metal basicity, Protonation, Trimethylphosphine",

author = "Merola, \{Joseph S.\} and Franks, \{Marion A.\}",

year = "2013",

month = jan,

day = "1",

doi = "10.1016/j.jorganchem.2012.09.020",

language = "English",

volume = "723",

pages = "49--55",

journal = "Journal of Organometallic Chemistry",

issn = "0022-328X",

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TY - JOUR

T1 - The basicity of [tris-(trimethylphosphine)(cyclooctadiene)iridium(I)]

AU - Merola, Joseph S.

AU - Franks, Marion A.

PY - 2013/1/1

Y1 - 2013/1/1

N2 - [Tris-(trimethylphosphine)(cyclooctadiene)iridium(I)]chloride, [Ir(COD)(PMe3)3]Cl, is very electron rich. In this report, that electron rich character is probed by examining the protonation of the complex at the metal center to form the dicationic [tris-(trimethylphosphine) (cyclooctadiene)(hydrido)iridium(III)], [HIr(COD)(PMe3) 3]+2. The exact formulation of the species formed depends on the nature of the Bronsted acid's counterion. Protonation with hydrogen chloride, fluoroboric acid, and triflic acid are all described and the structure of the dication and some products from further reaction of the dication are elucidated. Simple aqueous acid/base titration of [Ir(COD)(PMe3) 3]Cl is described yielding a pKa for [HIr(COD)(PMe 3)3]+2 of 4.2.

AB - [Tris-(trimethylphosphine)(cyclooctadiene)iridium(I)]chloride, [Ir(COD)(PMe3)3]Cl, is very electron rich. In this report, that electron rich character is probed by examining the protonation of the complex at the metal center to form the dicationic [tris-(trimethylphosphine) (cyclooctadiene)(hydrido)iridium(III)], [HIr(COD)(PMe3) 3]+2. The exact formulation of the species formed depends on the nature of the Bronsted acid's counterion. Protonation with hydrogen chloride, fluoroboric acid, and triflic acid are all described and the structure of the dication and some products from further reaction of the dication are elucidated. Simple aqueous acid/base titration of [Ir(COD)(PMe3) 3]Cl is described yielding a pKa for [HIr(COD)(PMe 3)3]+2 of 4.2.

KW - Iridium

KW - Iridium hydride

KW - Iridium phosphine

KW - Metal basicity

KW - Protonation

KW - Trimethylphosphine

UR - https://www.scopus.com/pages/publications/84868543639

U2 - 10.1016/j.jorganchem.2012.09.020

DO - 10.1016/j.jorganchem.2012.09.020

M3 - Article

SN - 0022-328X

VL - 723

SP - 49

EP - 55

JO - Journal of Organometallic Chemistry

JF - Journal of Organometallic Chemistry

ER -

The basicity of [tris-(trimethylphosphine)(cyclooctadiene)iridium(I)]

Abstract

Keywords

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