2 research outputs found
Aryl and Benzyl C–H Activation of N‑Substituted PNP Ligands
No full textThe synthesis of the <i>N</i>-aryl-substituted PNP pro-ligands
H(PN<sup>naph</sup>P) (<i>N</i>-di(2-diisopropylphosphine-4-methylphenyl)naphthylamine)
and H(PN<sup>tol</sup>P) (<i>N</i>-di(2-diisopropylphosphine-4-methylphenyl)-<i>o</i>-tolylamine) is reported. The corresponding iridium(III)
complexes, [(PN<sup>naph</sup>P)Ir(H)Cl], [(<i>o</i>-methyl-PN<sup>tol</sup>P)Ir(H)Cl], [(<i>o</i>-aryl-PN<sup>tol</sup>P)Ir(H)Cl], [(PN<sup>naph</sup>P)Ir(H)<sub>2</sub>], [(<i>o</i>-methyl-PN<sup>tol</sup>P)Ir(H)<sub>2</sub>], and
[(<i>o</i>-aryl-PN<sup>tol</sup>P)Ir(H)<sub>2</sub>], were also synthesized and structurally characterized, along with
reaction intermediates, demonstrating various ligand coordination
modes
Influence of Substituents on the Electronic Structure of Mono- and Bis(phosphido) Thorium(IV) Complexes
No full textA series of metallocene thorium complexes
with mono- and bis(phosphido) ligands have been investigated with
varying hues: (C<sub>5</sub>Me<sub>5</sub>)<sub>2</sub>Th(Cl)[P(Mes)<sub>2</sub>] (Mes = mesityl = 2,4,6-(CH<sub>3</sub>)<sub>3</sub>C<sub>6</sub>H<sub>2</sub>; dark red-purple), (C<sub>5</sub>Me<sub>5</sub>)<sub>2</sub>Th[P(Mes)(CH<sub>3</sub>)]<sub>2</sub> (dark red-purple),
(C<sub>5</sub>Me<sub>5</sub>)<sub>2</sub>Th(CH<sub>3</sub>)[P(Mes)<sub>2</sub>] (dark red-purple), (C<sub>5</sub>Me<sub>5</sub>)<sub>2</sub>Th(CH<sub>3</sub>)[P(Mes)(SiMe<sub>3</sub>)] (orange), (C<sub>5</sub>Me<sub>5</sub>)<sub>2</sub>Th(Cl)[P(Mes)(SiMe<sub>3</sub>)] (orange),
(C<sub>5</sub>Me<sub>5</sub>)<sub>2</sub>Th[P(Mes)(SiMe<sub>3</sub>)]<sub>2</sub> (orange), and (C<sub>5</sub>Me<sub>5</sub>)<sub>2</sub>Th[PH(Mes)]<sub>2</sub> (pale yellow). While all of these complexes
bear a mesityl group on phosphorus, the electronic structure observed
differs depending on the other substituent (mesityl, methyl, trimethylsilyl,
or hydrogen). This sparked an investigation of the electronic structure
of these complexes using <sup>31</sup>P NMR and electronic absorption
spectroscopy in concert with time-dependent density functional theory
calculations
