Results 251 to 260 of about 15,805 (306)

Energetics and bonding in beryllium metallized carbon clusters

open access: closedJournal of Molecular Structure: THEOCHEM, 2007
Small carbon clusters C, C2 and C3 metallized with beryllium were studied by first principles within the hybrid density functional approach with generalized gradient correction. Cluster isomer structures for the ground state and several excited states where systematically calculated for CxBey with x = 1–3 and y = 1–4 including the vibrational analysis ...
Anthony Patrick   +2 more
openalex   +2 more sources

Bonding in Beryllium Clusters

Annual Review of Physical Chemistry, 2011
Beryllium clusters provide an ideal series for exploring the evolution from discrete molecules to the metallic state. The beryllium dimer has a formal bond order of zero, but the molecule is weakly bound. In contrast, bulk-phase beryllium is a hard metal with a high melting point.
Michael C, Heaven   +2 more
openaire   +2 more sources

Triple bonding between beryllium and nitrogen in HNBeCO

Chemical Communications, 2022
HNBeCO is generated in a neon matrix and identified via vibrational spectroscopy. It possesses an unprecedented triple bond, consisting of two π-bonds and a dative σ-bond, with the former bonds being much stronger than the latter bond.
Lina Wang   +5 more
openaire   +2 more sources

Beryllium and Strong Hydrogen Bonds

Journal of Occupational and Environmental Hygiene, 2009
We compare beryllium to H+ and show that beryllium can displace H+ in many "strong hydrogen bonds" where Be as a "tetrahedral proton" (O-Be-O angle is tetrahedral as opposed to the nearly linear O-H-O angle) is thermodynamically preferred. The strong hydrogen bond provides two advantages.
T Mark, McCleskey, Brian L, Scott
openaire   +2 more sources

Ultra‐Weak Metal−Metal Bonding: Is There a Beryllium‐Beryllium Triple Bond?

ChemPhysChem, 2019
AbstractMetal‐metal triple bonds featuring s‐block element have not been reported until now. Only Be−Be double bonds between have been predicted theoretically based on the intuitive electron donation from four s1 type electron‐donating ligands. Herein, we theoretically predicted a novel species featuring a Be−Be triple bond in the Li6Be2 molecule.
Shahnaz S. Rohman   +5 more
openaire   +2 more sources

Bonding in beryllium carbonyls

Chemical Physics Letters, 1994
Abstract The nature bonding in Be(CO) 2 and Be 2 (CO) 4 has been discussed on the basis of bond indices, valencies and localized MOs. Similar calculations have been performed also on HBeBeH in order to elucidate the nature of the BeBe bond in Be 2 (CO) 4 .
T. Kar, P.K. Nandi, A.B. Sannigrahi
openaire   +1 more source

Modulating the strength of tetrel bonding through beryllium bonding

Journal of Molecular Modeling, 2016
Quantum chemical calculations were performed to investigate the stability of the ternary complexes BeH2···XMH3···NH3 (X = F, Cl, and Br; M = C, Si, and Ge) and the corresponding binary complexes at the atomic level. Our results reveal that the stability of the XMH3···BeH2 complexes is mainly due to both a strong beryllium bond and a weak tetrel-hydride
Mingxiu, Liu   +6 more
openaire   +2 more sources

Beryllium doubles down on nitrogen bonding

Chemical & Engineering News, 2021
Metals on the west wing of the periodic table—the s-block elements—almost never form double bonds, because of the meager capacity of their s orbitals. Now, a team led by Robert J. Gilliard Jr.
openaire   +1 more source

Diffusion bonding of beryllium-copper alloys

Journal of Materials Science, 1992
A process has been developed for diffusion-bonding identical beryllium-copper alloy, 1.8 to 2.0 wt% Be, which has produced bond strengths comparable to that of the bulk. Bonding resulted from self-diffusion between two Be-Cu samples, brought into intimate contact and heated in a high vacuum.
D. C. Eckman   +2 more
openaire   +1 more source

Strong beryllium–beryllium bonds

Physical Chemistry Chemical Physics
Metal–metal bonds have attracted the attention of chemists for a long time. The nature of metal–metal bonds spans from covalent single to multiple bonds.
Palash J. Thakuria   +3 more
openaire   +1 more source

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