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Here is the original article. Distinction between the weak hydrogen bond and the van der Waals interaction Thomas Steiner*a and Gautam R. Desiraju* Chem. Commun., 1998 891-892 On Thu, Feb 19, 2009 at 11:27 PM, Pius Padayatti <[log in to unmask]> wrote: > 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 <[log in to unmask]> 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 [log in to unmask] [log in to unmask] >> > > > > -- > Pius S Padayatti > Scientist, > Polgenix, Inc. > 11000 Cedar Ave, Suite 260 > Cleveland, OH 44106 > Phone: 216-658-4528 > Fax: 216-658-4529 > -- Pius S Padayatti Scientist, Polgenix, Inc. 11000 Cedar Ave, Suite 260 Cleveland, OH 44106 Phone: 216-658-4528 Fax: 216-658-4529