The Elusive Palladium-Diazo Adduct Captured: Synthesis, Isolation and Structural Characterization of [(ArNHC-PPh2 )Pd(η2 -N2 C(Ph)CO2 Et)].
Silvia G RullEleuterio ÁlvarezManuel R FructosTomás R BelderrainPedro J PérezPublished in: Chemistry (Weinheim an der Bergstrasse, Germany) (2017)
The first example of a diazo palladium adduct is reported. The complexes [(ArNHC-PPh2 )M(η2 -N2 C(Ph)CO2 Et)] (M=Ni, 3; M=Pd, 4; ArNHC-PPh2 =3-(2,6-diisopropylphenyl)-1-[(diphenylphosphino)ethyl]imidazol-2-ylidene) were prepared by ligand exchange with styrene-coordinated precursors [(ArNHC-PPh2 )M(styrene)] (M=Ni, 1; M=Pd, 2). Complex 4 was fully characterized, including X-ray analyses; this constitutes the first example of a diazo adduct compound with palladium, thereby closing the gap between Groups 8 and 10 regarding this type of compounds.