62678-49-3

Upstream product

• 110-22-5 diacetyl peroxide 
• 131-11-3 phthalic acid dimethyl ester 
• 5787-28-0 (S)-2-phenyl-1-butane 
• 13144-95-1 2-chloro-2-phenylbutane 
• 60-29-7 diethyl ether 
• 143982-18-7 (1-bromo-1-methyl-propyl)-benzene 
• 135-98-8 sec-Butylbenzene 

Downstream Products

• 10192-93-5 D,L-3,4-Dimethyl-3,4-diphenylhexan 
• 130379-07-6 meso-3,4-bis-(4-amino-phenyl)-3,4-dimethyl-hexane 
• 83294-20-6 (3RS,4SR)-3,4-dimethyl-3,4-bis(p-nitrophenyl)hexane 

Relevant academic research and scientific papers

Thermolabile Hydrocarbons, XXII. Thermolysis of symm. Tetraalkyldiarylethanes and the Resonance Energy of α,α-Dialkylbenzyl Radicals

The products and the activation parameters for the thermolysis reactions of the hydrocarbons 1 - 10 were determined.From correlations between ΔG% and the ground state strain Hsp or the change in strain during the dissociation process Dsp the steric acceleration of this reaction was analyzed quantitatively.A comparison of this analysis with a corresponding correlation for simple Cq - Cq alkanes results in a resonance energie of 8.4 +/- 1.1 kcal * mol-1 for α,α-dialkylbenzyl radicals.The origin of the appreciable variation of ΔS% in this series and for the poorer precision of ΔH% /Hsp correlations is discuss ed.

Thermolabile Hydrocarbons, XX. Synthesis, Structure, and Strain of Sym. Tetraalkyl-1,2-diarylethanes

The syntheses of 18 1,1,2,2-tetraalkyl-1,2-diarylethanes 1 - 4 by dimerisation procedures starting with 10 - 13 are reported.In the absence of p-substituents X and with increasing alkyl side chains the α,p-dimers 6 or their aromatic counter parts 7 are obtained besides or instead of 1.The relationships between strain enthalpy Hs, bond lengths, bond angles, torsional angles, and rotational barrier are discussed on the basis of force field calculations.They are supported by two additional experimental structure determinations by X-ray diffraction.