Thermal reactivity of cis- and trans-bis(triphenylgermyl)bis(tertiary phosphine)platinum(II)

Formation and Ring Expansion of Germaplatinacycles via Dehydrogenative Ge−Ge and Ge−Pt Bond-Forming Reactions

“…Treatment of 1 with H 2 GePh 2 in 1:1.2 molar ratio at 90 °C produced trigermaplatinacyclobutane [Pt(GePh 2 GePh 2 GePh 2 )(dmpe)] ( 2 ) in 87% yield (Scheme ). Complexes with monodentate phosphine and triorganogermyl ligands, cis -[Pt(GePh 2 R) 2 (PMe 2 Ph) 2 ] (R = Ph, Me), undergo thermal isomerization to give an equilibrium mixture of the cis and trans complexes and do not cause any Ge−Ge bond-forming reactions . Further reaction of excess H 2 GePh 2 with the isolated complex 2 at 90 °C for 48 h afforded the five-membered tetragermaplatinacycle [Pt(GePh 2 GePh 2 GePh 2 GePh 2 )(dmpe)] ( 3 ) in 29% yield (Scheme ).…”

Element–Hydrogen Bond Activations at Cationic Platinum Centers To Produce Silylene, Germylene, Stannylene, and Stibido Complexes

“…Repeated attempts to produce X-ray quality crystals of the complex were unsuccessful. Germylene species of group 10 metals are well known − and in some cases can be prepared by addition of an isolable germylene to a low-valent metal precursor. Banaszak Holl and coworkers have established that such germylene complexes have a rich reaction chemistry associated with activations of various small molecules. − …”

Rhodium complexes of 1,3-diaryltriazenes: Usual coordination, N–H bond activation and, N–N and C–N bond cleavage

“…Examples of such g 1 -bound aryl complexes are relatively less common in the literature [58][59][60][61][62][63][64][65][66][67][68][69][70][71][72][73]. It may be added in this context that metal mediated C-N bond cleavage, though not very uncommon, is mostly limited to strained amines and amidines [74][75][76][77][78][79], and hence there is significant interest in transition metal mediated C-N bond cleavage [80][81][82][83][84][85][86][87][88][89].…”