860802-01-3

Upstream product

• 673-32-5 1-Phenylprop-1-yne 
• 860801-89-4 1,1,2,2-tetraethyl-3-phenyl-1,2-digermacyclobut-3-ene 
• 867300-55-8 (Z)-α,β-(diethylgermyl)styrene 
• 536-74-3 phenylacetylene 
• 860801-90-7 Z-α,β-bis(chlorodiethylgermyl)styrene 
• 7313-20-4 1,2-dichlorotetraethyldigermane 

Relevant academic research and scientific papers

Preparation, structural characterization of 1,2-digermacyclobut-3-enes, and their palladium-catalyzed insertion of alkynes

1,2-Digermacyclobut-3-enes were prepared by the treatment of Z-α,β-bis(chlorodialkylgermyl)ethenes with Na metal in boiling toluene and their structures were fully established by spectroscopic methods coupled with X-ray crystallography. In the presence of an appropriate catalyst, 1,2-digermacyclobut-3-enes reacted smoothly with alkynes to give the corresponding insertion products, 1,4-digermacyclohexa-2,5-dienes in moderate to good yields. Conventional complexes, such as [Pd(PPh3)4] and [Pt(PPh3)4], serve as efficient catalysts. The mechanism of the insertion reaction of alkynes into the germanium-germanium bond of 1,2-digermacyclobut-3-enes is discussed in terms of a key intermediate, a 1,4-digerma-2-buten-1,4-diylpalladium.

Preparation and structural characterization of 1,4-digerma-2-buten-1,4- diylplatinum(II) complexes and their reactions with alkynes, carbon monoxide, and isocyanides

1,4-Digerma-2-buten-1,4-diylplatinum(II) complexes were prepared by treatment of a (η-ethylene)(triphenylphosphine)platinum(0) complex with (Z)-α,β-bis(dialkylgermyl)styrenes, and their structures were determined by spectroscopic analysis coupled with X-ray diffraction methods. Thermolysis of 1,4-digerma-2-buten-1,4-diylplatinum(II) complexes afforded linear and cyclic trigermanes and a dinuclear platinum complex. The 1,4-digerma-2-buten-1,4-diylplatinum(II) complexes reacted with alkynes to give the corresponding insertion products, cyclic germy(germylvinyl)platinum(II) species, whose structures have been determined by spectroscopic analysis. The cyclic germy(germylvinyl)platinum(II) complexes were found to easily liberate 1,4-digermacyclohexa-2,5-dienes and a platinum(O) complex. The reactions of 1,4-digerma-2-buten-1,4-diylplatinum(II) complexes with carbon monoxide and isocyanides afforded the corresponding platinum complexes containing one carbon monoxide and one isocyanide ligand, respectively.