A series of excited electronic states of AH2 molecules having extremely small bond angles has been discovered theoretically. Systems which have shown this characteristic to date include H2O+, NH2, CH2+, and NH2+. In the present research ab initio studies were carried out using a double zeta ...
The (1)JCαHα coupling constant is particularly suited for cross-validation, because it has a large magnitude and mostly depends on the often less accessible dihedral angle ψ. Here, we reinvestigated the connection between (1)JCαHα values and protein backbone dihedral angles. We show that...
An angle named gamma has been employed to describe the geometry at a hydrogen bond between main-chain atoms of polypeptides. In antiparallel beta-sheet, ga... PH Maccallum,R Poet,EJ Milner-White - 《Journal of Molecular Biology》 被引量: 186发表: 1995年 ChemInform Abstract: Insertion of Ben...
Why Platinum Catalysts Involving Ligands with Large Bite Angle Are so Efficient in the Allylation of Amines: Design of a Highly Active Catalyst and Compreh... The platinum-catalyzed allylation of amines with allyl alcohols was studied experimentally and theoretically. The complexes [Pt(路3-allyl)(...
Electron deficient compounds • Diborane • Electron deficiency in BeCl2, BeH2, and AlCl3 • Bond angle • Bond length BOARDS MAIN Electron Deficient Compounds Compounds that have an insufficient number of electrons to complete the octet of central atoms are known as elec...
Making reference to resonance structures, hybridization, and the orbital overlaps involved in making bonds, explain why the C-N bonds of the (NH2)2CO (urea) molecule do not rotate. Explain why the bond angle in a water molecule is smaller than 109.5 degrees....
Rotational barriers in 19 molecules possessing a single internal rotation angle around a B-N, C-C, C-N, C-O, N-N, N-O, O-O central bond and geometrical isomerism in 3 molecules possessing a N=N double bond have been studied ab initio by the improved bond-orbital method. The first...
What type of chemical bond connects atoms that equally share electrons such as the bonds between a hydrogen atom and a carbon atom in methane?Which of the following molecules has the smallest bond angle between any two adjacent hydrogen atoms? Explain why. A. C H 4 . B. H 2 O . C. ...
bond angle.pdf,Rearrangements in Model Peptide-Type Radicals via Intramolecular Hydrogen-Atom Transfer by Damian Moran*a)b), Rebecca Jacobc), Geoffrey P. F. Wooda)b), Michelle L. Cooteb)c), Michael J. Daviesb)d), Richard A. J. O!Hairb)e), Christopher J.
number of nonbonding electron pairs c. electron geometry d. molecular geometry e. approximate bond angle Draw the Lewis dot structure for SO32-. Determine the electron geometry and molecular shape of this molecule. Draw the Lewis structure for SBr2 and provi...