... Sign in. Sign in OpenAthens login. Login via your institution. Other institution login. Sign in using your ScienceDirect credentials. Username: Password: Remember me. | Not Registered? Forgotten username or password? Help. Download full text in PDF Opens in a new window. ... J. Gen. Chem. USSR (engl. Transl.), 39 (1969), pp. 2126–2132 The σ value for this group is 0.52. See. ... 2.(a); a X. Creary, CC Geiger, K. Hilton; J. Am. Chem. Soc., 105 (1983), pp. 2851–2858 ...