Synthesis and Reactivity of Bis(6‐diphenylphosphinoacenaphth‐5‐yl)ditelluride

Abstract

The reduction of the previously known [(6‐Ph2P‐Ace‐5‐)Te]Cl with K‐selectride (K[sec‐Bu3BH]) provided the title compound (6‐Ph2P‐Ace‐5‐)2Te2 (1). The oxidation of 1 under aerobic conditions afforded the related (6‐Ph2P(O)‐Ace‐5‐)2Te2 (2). Alternatively, 2 was prepared by reduction of the previously known 6‐Ph2P(O)‐Ace‐5‐TeCl with K‐selectride. The reaction of 1 with [Cp(CO)2Fe]2 proceeded with cleavage of the Te–Te and Fe–Fe bonds with elimination of CO and gave rise to a racemic mixture of (6‐Ph2P‐Ace‐5‐)TeFe(CO)Cp (3), which contains pseudo‐tetrahedral Fe atoms in a chiral environment. Upon crystallization, the racemate most likely undergoes spontaneous resolution into a conglomerate of enantiopure crystals.

Phosphine and Selenoether peri-Substituted Acenaphthenes and Their Transition-Metal Complexes: Structural and NMR Investigations

“…The peri -substituted systems with phosphine and telluroether groups have been studied more extensively and include simple hybrid ligands B4 ( 15 ) ( Figure 2 ) as well as geminally dinaphthyl substituted species B5 ( 16 ) and ditelluride B6 . 17 One of the B4 molecules, Acenap(P i Pr 2 )(TeMes), was used as a bidentate ligand toward Pt(II) and Au(I) fragments in complexes B7 . 15 The dinaphthyl ligand B5 acted as bidentate or tridentate ligand in mononuclear complexes, κ 2 P,P′,κTe ( B8 ) and κP,κTe ( B9 ).…”