Silver ion enhanced C-H activation in Pt(ii) hydroxo complexes

Tracy L. Lohr; Warren E. Piers; Michael J. Sgro; Masood Parvez

doi:10.1039/c4dt01934b

Silver ion enhanced C-H activation in Pt(ii) hydroxo complexes

Tracy L. Lohr, Warren E. Piers^*, Michael J. Sgro, Masood Parvez

^*Corresponding author for this work

Chemistry

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

11 Scopus citations

Abstract

Reacting neutral Pt(ii) hydroxo compounds (NN)Pt(R)(OH) (R = OH, Ph, and Me, NN = bulky terphenyl diimine) with silver bis(trifluromethanesulfonyl)imide produces new hydroxo complexes with the silver binding through the Pt-OH bonds as determined by ¹⁹⁵Pt NMR and X-ray analysis (R = OH). These complexes were found to activate the aromatic C-D bonds of C₆D ₆ at significantly enhanced rates relative to the silver free hydroxo complexes. Mechanistic studies for R = Ph are consistent with a homogeneous pathway that is bimolecular (ΔH^‡ = 17(2) kcal mol ^-1 and ΔS^‡ = -25(6) e.u. and ΔG‡295 = 10(2) kcal mol^-1), first order in [Pt] and substrate.

Original language	English (US)
Pages (from-to)	13858-13864
Number of pages	7
Journal	Dalton Transactions
Volume	43
Issue number	37
DOIs	https://doi.org/10.1039/c4dt01934b
State	Published - 2014

ASJC Scopus subject areas

Inorganic Chemistry

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title = "Silver ion enhanced C-H activation in Pt(ii) hydroxo complexes",

abstract = "Reacting neutral Pt(ii) hydroxo compounds (NN)Pt(R)(OH) (R = OH, Ph, and Me, NN = bulky terphenyl diimine) with silver bis(trifluromethanesulfonyl)imide produces new hydroxo complexes with the silver binding through the Pt-OH bonds as determined by 195Pt NMR and X-ray analysis (R = OH). These complexes were found to activate the aromatic C-D bonds of C6D 6 at significantly enhanced rates relative to the silver free hydroxo complexes. Mechanistic studies for R = Ph are consistent with a homogeneous pathway that is bimolecular (ΔH‡ = 17(2) kcal mol -1 and ΔS‡ = -25(6) e.u. and ΔG‡295 = 10(2) kcal mol-1), first order in [Pt] and substrate.",

author = "Lohr, {Tracy L.} and Piers, {Warren E.} and Sgro, {Michael J.} and Masood Parvez",

year = "2014",

doi = "10.1039/c4dt01934b",

language = "English (US)",

volume = "43",

pages = "13858--13864",

journal = "Dalton Transactions",

issn = "1477-9226",

publisher = "Royal Society of Chemistry",

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TY - JOUR

T1 - Silver ion enhanced C-H activation in Pt(ii) hydroxo complexes

AU - Lohr, Tracy L.

AU - Piers, Warren E.

AU - Sgro, Michael J.

AU - Parvez, Masood

PY - 2014

Y1 - 2014

N2 - Reacting neutral Pt(ii) hydroxo compounds (NN)Pt(R)(OH) (R = OH, Ph, and Me, NN = bulky terphenyl diimine) with silver bis(trifluromethanesulfonyl)imide produces new hydroxo complexes with the silver binding through the Pt-OH bonds as determined by 195Pt NMR and X-ray analysis (R = OH). These complexes were found to activate the aromatic C-D bonds of C6D 6 at significantly enhanced rates relative to the silver free hydroxo complexes. Mechanistic studies for R = Ph are consistent with a homogeneous pathway that is bimolecular (ΔH‡ = 17(2) kcal mol -1 and ΔS‡ = -25(6) e.u. and ΔG‡295 = 10(2) kcal mol-1), first order in [Pt] and substrate.

AB - Reacting neutral Pt(ii) hydroxo compounds (NN)Pt(R)(OH) (R = OH, Ph, and Me, NN = bulky terphenyl diimine) with silver bis(trifluromethanesulfonyl)imide produces new hydroxo complexes with the silver binding through the Pt-OH bonds as determined by 195Pt NMR and X-ray analysis (R = OH). These complexes were found to activate the aromatic C-D bonds of C6D 6 at significantly enhanced rates relative to the silver free hydroxo complexes. Mechanistic studies for R = Ph are consistent with a homogeneous pathway that is bimolecular (ΔH‡ = 17(2) kcal mol -1 and ΔS‡ = -25(6) e.u. and ΔG‡295 = 10(2) kcal mol-1), first order in [Pt] and substrate.

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U2 - 10.1039/c4dt01934b

DO - 10.1039/c4dt01934b

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SP - 13858

EP - 13864

JO - Dalton Transactions

JF - Dalton Transactions

IS - 37

ER -

Silver ion enhanced C-H activation in Pt(ii) hydroxo complexes

Abstract

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