Lutidine-derived Ru-CNC hydrogenation pincer catalysts with versatile coordination properties

G. Filonenko; E. Cosimi; L. Lefort; M.P. Conley; C. Copéret; M. Lutz; E.J.M. Hensen; E.A. Pidko

doi:10.1021/cs500720y

Lutidine-derived Ru-CNC hydrogenation pincer catalysts with versatile coordination properties

G. Filonenko, E. Cosimi, L. Lefort, M.P. Conley, C. Copéret, M. Lutz, E.J.M. Hensen, E.A. Pidko

Inorganic Materials & Catalysis

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Abstract

Lutidine-derived bis-N-heterocyclic carbene (NHC) ruthenium CNC–pincer complexes (Ru-CNCs) were prepared. They showed various coordination modes of the two NHC ligands depending on the synthetic procedure, yielding normal (1, 2) or mixed normal/abnormal NHC-complexes (3). In the presence of phosphazene base, Ru-CNC complexes activate nitriles to give ketimino compounds 4-6. Nitrile adduct 4 shows reactivity towards strong bases to yield dearomatized complex 7, that heterolytically activate H2 to form the bis-hydrido complex 8. Finally, these Ru-CNCs are active in catalytic hydrogenation of CO2 to formate salts and, unlike the phosphine-containing Ru-PNP counterpart, they also catalyze the selective hydrogenation of esters to alcohols.

Original language	English
Pages (from-to)	2667-2671
Number of pages	5
Journal	ACS Catalysis
Volume	4
Issue number	8
DOIs	https://doi.org/10.1021/cs500720y
Publication status	Published - 2014

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title = "Lutidine-derived Ru-CNC hydrogenation pincer catalysts with versatile coordination properties",

abstract = "Lutidine-derived bis-N-heterocyclic carbene (NHC) ruthenium CNC–pincer complexes (Ru-CNCs) were prepared. They showed various coordination modes of the two NHC ligands depending on the synthetic procedure, yielding normal (1, 2) or mixed normal/abnormal NHC-complexes (3). In the presence of phosphazene base, Ru-CNC complexes activate nitriles to give ketimino compounds 4-6. Nitrile adduct 4 shows reactivity towards strong bases to yield dearomatized complex 7, that heterolytically activate H2 to form the bis-hydrido complex 8. Finally, these Ru-CNCs are active in catalytic hydrogenation of CO2 to formate salts and, unlike the phosphine-containing Ru-PNP counterpart, they also catalyze the selective hydrogenation of esters to alcohols.",

author = "G. Filonenko and E. Cosimi and L. Lefort and M.P. Conley and C. Cop{\'e}ret and M. Lutz and E.J.M. Hensen and E.A. Pidko",

year = "2014",

doi = "10.1021/cs500720y",

language = "English",

volume = "4",

pages = "2667--2671",

journal = "ACS Catalysis",

issn = "2155-5435",

publisher = "American Chemical Society",

number = "8",

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TY - JOUR

T1 - Lutidine-derived Ru-CNC hydrogenation pincer catalysts with versatile coordination properties

AU - Filonenko, G.

AU - Cosimi, E.

AU - Lefort, L.

AU - Conley, M.P.

AU - Copéret, C.

AU - Lutz, M.

AU - Hensen, E.J.M.

AU - Pidko, E.A.

PY - 2014

Y1 - 2014

N2 - Lutidine-derived bis-N-heterocyclic carbene (NHC) ruthenium CNC–pincer complexes (Ru-CNCs) were prepared. They showed various coordination modes of the two NHC ligands depending on the synthetic procedure, yielding normal (1, 2) or mixed normal/abnormal NHC-complexes (3). In the presence of phosphazene base, Ru-CNC complexes activate nitriles to give ketimino compounds 4-6. Nitrile adduct 4 shows reactivity towards strong bases to yield dearomatized complex 7, that heterolytically activate H2 to form the bis-hydrido complex 8. Finally, these Ru-CNCs are active in catalytic hydrogenation of CO2 to formate salts and, unlike the phosphine-containing Ru-PNP counterpart, they also catalyze the selective hydrogenation of esters to alcohols.

AB - Lutidine-derived bis-N-heterocyclic carbene (NHC) ruthenium CNC–pincer complexes (Ru-CNCs) were prepared. They showed various coordination modes of the two NHC ligands depending on the synthetic procedure, yielding normal (1, 2) or mixed normal/abnormal NHC-complexes (3). In the presence of phosphazene base, Ru-CNC complexes activate nitriles to give ketimino compounds 4-6. Nitrile adduct 4 shows reactivity towards strong bases to yield dearomatized complex 7, that heterolytically activate H2 to form the bis-hydrido complex 8. Finally, these Ru-CNCs are active in catalytic hydrogenation of CO2 to formate salts and, unlike the phosphine-containing Ru-PNP counterpart, they also catalyze the selective hydrogenation of esters to alcohols.

U2 - 10.1021/cs500720y

DO - 10.1021/cs500720y

M3 - Article

SN - 2155-5435

VL - 4

SP - 2667

EP - 2671

JO - ACS Catalysis

JF - ACS Catalysis

IS - 8

ER -

Lutidine-derived Ru-CNC hydrogenation pincer catalysts with versatile coordination properties

Abstract

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