ao8b00437_si_002.zip (1.5 MB)
Distinct Palladium(II) Carbene Complexes Supported by Six-Membered 1,3-Disubstituted Permidin-2-ylidene, Six-Membered N‑Heterocyclic Carbenes
dataset
posted on 2018-06-19, 14:34 authored by Sojung Lee, Bulat Gabidullin, Darrin RichesonThe
first synthesis, isolation, and characterization of permidin-2-ylidene
complexes of Pd(II) is reported with entry resulting from either a
direct reaction with isolable six-membered N-heterocyclic carbene
or from the enetetramine, arising from dimerization of the carbene.
Furthermore, a simplified method to prepare N,N′-disubstituted
perimidinium bromide salts, precursors to 1,3-disubstituted perimidin-2-ylidene,
was achieved using ammonium bromide as a source of weak acid. Through
synthesis and nuclear magnetic resonance spectroscopic analysis of
a carbene-phosphinidine adduct, an interrogation of the fundamental
π-bonding ability of 1,3-diisopropylperimidin-2-ylidene revealed
this interaction to be weak and of a similar order to unsaturated
imidazol-2-ylidenes.