Table 1 Numerical data for X–H···Y contacts with H···Y < 3.0 Å (2.7 Å for H···H contacts). Data for normalised H-atom positions Mean Mean Mean Contact type Number H···Y (Å) X···Y (Å) X–H···Y (°) C(sp3)–O–H···ONC 3330 1.974(6) 2.837(4) 154.0(4) CáC–H···ONC 44 2.36(4) 3.31(2) 152(2) CNCH2···ONC 124 2.67(1) 3.56(2) 143(1) CH2–CH3···ONC 767 2.761(6) 3.590(7) 137.1(7) CH2–CH3···H–C 3975 2.500(2) 3.246(4) 128.6(3)
ref:Chem. Commun., 1998 891 On Thu, Feb 19, 2009 at 7:48 PM, Jim Fairman <fairman....@gmail.com> wrote: > Fellow CCP4 Board Members, > > What is the general consensus of the structural biology community for a > range of distances that would be considered a Van der Waals > contact/interaction (eg: hydrogen bonds are usually considered to be 2.5-3.5 > angstroms not including the hydrogen atoms)? > > Cheers, Jim > > -- > Jim Fairman > Graduate Research Assistant > Department of Biochemistry, Cellular, and Molecular Biology (BCMB) > University of Tennessee -- Knoxville > 216-368-3337 jfair...@utk.edu james.fair...@case.edu > -- Pius S Padayatti Scientist, Polgenix, Inc. 11000 Cedar Ave, Suite 260 Cleveland, OH 44106 Phone: 216-658-4528 Fax: 216-658-4529