... Tetrahedron. Volume 52, Issue 7, 12 February 1996, Pages 2557–2564. Cover image Cover image. Charge control in the S N Ar reaction. Meta substitution with respect to the activating nitro group in 3,4-dihalogenonitrobenzenes. ... 7. VM Vlasov; J. Fluorine Chem., 61 (1993), p. 193 ...