Structure and UV spectra of aliphatic-aromatic phosphines

Five-coordinate Tertiary Phosphine and Arsine Adducts of Copper(hexafluoroacetylacetonate)2

“…The extinction coefficient of the arsine derivative is probably low because of partial dissociation. There is no correlation of the band intensities with the basicities of these ligands in polar solvents (19,20).…”

On the Edge of the Known: Extremely Electron‐Rich (Di)Carboranyl Phosphines

“…[28] The half-wave potentials E 1/2 of the quasi-reversible oxidation are 1.59 V (2) and 1.53 V (4) (Table 2). In contrast, the tertbutyl-containing phosphines 1 and 3 display an irreversible 31 P{ 1 H} NMR [b] PtBu 3 57.7 [26] PMes 3 À 36.2 [27] PtBu 2 (9-mCb) (1) À 11.3…”

“…In contrast, the tertbutyl-containing phosphines 1 and 3 display an irreversible oxidation process at 1.686 V (1) and 1.606 V (3) due to the deficient steric shielding effect. [32] The oxidation potentials 31 P{ 1 H} NMR [b] PtBu 3 57.7 [26] PMes 3 À 36.2 [27] PtBu 2 (9-mCb) (1) À 11.3…”

Am Rande des Bekannten: Extrem elektronenreiche (Di)carboranylphosphane

“…[23] Während die mittleren BÀ P-Bindungslängen der Dicarboranylverbindungen (BÀ P = 1.952(4) Å (3), 1.939(2) Å (4)) gut mit anderen Phosphinoboranen vergleichbar sind, [24] sind die Bindungslängen der Monocarboranylphosphane (BÀ P = 1.970(2) Å (1), 1.977(2) Å (2)) etwas größer als die Länge einer typischen kovalenten Einfachbindung ((r kov (P) + r kov (B) = 1.96 Å). [25] Auf der Grundlage früherer Studien über sperrige Phosphane, die zeigten, dass elektrochemisch generierte Phosphoniumylradikalkationen durch sterisch anspruchsvolle 31 P{ 1 H}-NMR [a] 31 P{ 1 H}-NMR [b] PtBu 3 57.7 [26] PMes 3 À 36.2 [27] PtBu 2 (9-mCb) (1) À 11.3…”