7270-42-0

Upstream product

• 1012-73-3 1,4-bis(trimethylstannyl)benzene 
• 106-37-6 1.4-dibromobenzene 

Downstream Products

• 103396-72-1 1,2,5,1',2',5'-hexamethyl-4,4'-p-phenylene-bis-piperidin-4-ol 
• 57155-57-4 1,4-bis(diphenylhydroxymethyl)benzene 
• 6852-02-4 1,4-Bis-(diaethylphosphino)-benzol 
• 106683-48-1 hexa-Pb-phenyl-Pb,Pb'-p-phenylene-bis plumbane 
• 96872-40-1 1,4-bis(triphenylstannyl)benzene 
• 47071-60-3 p-C₆H₄(P(N(CH₃)2)2)2 
• 1993-42-6 1,4-Bis-(α,β-difluor-styryl)-benzol 
• 85573-02-0 1,4-bis(dimethylaminophenylphosphino)benzene 
• 106-42-3 para-xylene 
• 293757-21-8 9,9'-(1,4-phenylene)bis[2,7-bis(2-phenylethyl)-9H-fluoren-9-ol] 
• 293757-22-9 9,9'-(1,4-phenylene)bis[2,7-bis[2-(4-fluorophenyl)ethyl]-9H-fluoren-9-ol] 
• 293757-23-0 9,9'-(1,4-phenylene)bis[2,7-bis[2-(4-methoxyphenyl)ethyl]-9H-fluoren-9-ol] 
• 293757-25-2 9,9'-(1,4-phenylene)bis[2,7-bis{2-[4-(tert-butyl)phenyl]ethyl}-9H-fluoren-9-ol] 
• 293757-24-1 9,9'-(1,4-phenylene)bis[2,7-bis{2-[4-(2-phenylethyl)phenyl]ethyl}-9H-fluoren-9-ol] 

Relevant academic research and scientific papers

Novel organoborane Lewis acids via selective boron-tin exchange processes - Steric constraints to electrophilic initiation by the boron halide

With the purpose of preparing novel mono- and bidentate organoboron Lewis acids, the scope and limitations of synthesizing the requisite organoboranes by the boron-tin exchange between a boron halide and the appropriate organostannane have been examined in detail. The following organotin derivatives have been obtained either from the corresponding RMgBr or RLi reagent and MenSnCl4-n or from a Barbier procedure using the organic halide, Me3SnCl and magnesium metal: 1,2-bis(trimethylstannyl)ethyne, o-, m-, and p-bis(trimethylstannyl)benzenes, α,o-bis(trimethylstannyl)toluene, α,α-bis(trimethylstannyl)-o-xylene, and 2,2-dimethyl-2-stannaindane. The individual interaction of the 1,2-bis(trimethylstannyl)ethyne and the isomeric bis(trimethylstannyl)benzenes with Et2BBr produced the corresponding bis(diethylboryl)-derivatives. By contrast, with Et2BCl the α,o-bis(trimethylstannyl)toluene gave only o-diethylboryl-α-trimethylstannyltoluene and with BCl3 the α,α′-bis(trimethylstannyl)-o-xylene formed only α,α′-bis-(chlorodimethylstannyl)-o-xylene. Furthermore, in the attempted double boron-tin exchange between o-bis(trimethylstannyl)benzene and BCl3, an unprecedented rearrangement of the 1-(dichloroboryl)-2-(trimethylstannyl)benzene intermediate into its 1-[chloro(methyl)boryl]-2-(chlorodimethylstannyl) isomer was observed. Likewise, o-bis(trimethylstannyl)benzene with PhBCl2 produced by a similar rearrangement 1-[methyl(phenyl)boryl]-2-(chloro-dimethylstannyl)benzene. The thermolysis of such boranes led variously to definite dimers or ill-defined oligomers. Preliminary studies of the properties of these organoboranes have identified the heightened Lewis acidity of 1,2-bis(diethylboryl)ethyne and the π-electron delocalization involving the 2pΖ-boron orbitals in the 9,10-dihydro-9,10-diboraanthracene system. Finally, an electronic mechanism for the boron-tin exchange has been developed to account for the selectivity of the boron halide's attack at unsaturated carbon-tin bonds.

Double Clusters Containing Two Ligand-bridged Trinuclear Clusters

Using the patterns for the synthesis of simple RPM3 clusters we obtained M3P-R'-PM3 double clusters.Precursors of the connecting units P-R'-P (R'= p-C6H4 or 4,4'-C6H4-C6H4) were the partially new bifunctional phosphanes X2P-R'-PX2 (X = NEt2, Cl, H).Their