Equilibrium constants for triphenylmethyl bromide and 3-bromo-3-phenyldiazirine in acetonitrile

✍ Scribed by Michael T.H. Liu; N. Paike

• Book ID: 104227774
• Publisher: Elsevier Science
• Year: 1987
• Tongue: French
• Weight: 189 KB
• Volume: 28
• Category: Article
• ISSN: 0040-4039
• DOI: 10.1016/s0040-4039(00)96378-0

✦ Synopsis

The equilibrium constants at 25'C are 7.6 x 10 -3 and 2.0 x 10 -5 for triphenylmethyl bromide and bromodiazirine respectively. Moss and co-workers 132 demonstrated the existence of tight ion pairs from the exchange reactions of 3-halo-3-aryldiazirines. Particularly, they found 3-bromo-3-phenyldiazirine to be more effective than the corresponding 3-chloro-3phenyldiazirine in carrying out exchange reactions with tetra-n-butyl ammonium fluoride at ambient temperature. This study will observe the solution properties of triphenylmethyl bromide and 3-phenyl-3-bromodiazirine in order to obtain the equilibrium constants for these compounds. The equivalent conductances, A, of varying concentrations of triphenylmethyl bromide, 1, and 3-bromo-3_phenyldiazirine, 2, in acetonitrile were measured.3 The results are given in the following Table.