Results 231 to 240 of about 1,405,072 (310)

High‐Performance Polymeric Materials through Hydrogen‐Bond Cross‐Linking

Advances in Materials, 2019
It has always been critical to develop high‐performance polymeric materials with exceptional mechanical strength and toughness, thermal stability, and even healable properties for meeting performance requirements in industry.
Pingan Song, Hao Wang
semanticscholar   +1 more source

Bond, D-Bond

2015
Bund und Lander gehen kunftig „huckepack“ und begeben, so der Plan, 2013 eine erste gemeinsame Anleihe, den so genannten Deutschland-Bond. Das gleicht einer kleinen Revolution, wurde doch in der Vergangenheit ein solches Ansinnen immer wieder abgelehnt. „Intelligentes Schuldenmanagement“ nennt das Bundesfinanzministerium seinen neuen Standpunkt.
Stefanie Hüthig, Stefanie Burgmaier
openaire   +2 more sources

Bond length and bond multiplicity: σ-bond prevents short π-bonds

Chem. Commun., 2006
Analysis of model compounds such as Fe2(CO)6, C2 and HBBH shows that pi-bonds left to themselves are shorter than sigma-bonds; in many ways sigma-bonds prevent pi-bonds from adopting their optimal shorter distances.
Henry F. Schaefer, Biswarup Pathak, Biswarup Pathak, Eluvathingal D. Jemmis, Eluvathingal D. Jemmis, R. Bruce King   +5 more
openaire   +2 more sources

Chalcogen Bond: A Sister Noncovalent Bond to Halogen Bond

The Journal of Physical Chemistry A, 2009
A sister noncovalent bond to halogen bond, termed chalcogen bond, is defined in this article. By selecting the complexes H(2)CS...Cl(-), F(2)CS...Cl(-), OCS...Cl(-), and SCS...Cl(-) as models, the bond-length change, interaction energy, topological property of the electron charge density and its Laplacian, and the charge transfer of the chalcogen bond ...
Baoming Ji, Weizhou Wang, Yu Zhang
openaire   +3 more sources

Bearer Bonds and Coupons. Bond Prices and Returns of Bonds

2021
The financial product bond is examined in detail. Important terms are explained in a clear way.
Ralf Korn, Bernd Luderer
openaire   +2 more sources

To Bond or Not to Bond? That is the Question

Journal of Cases in Educational Leadership, 2015
This case, inspired by a real school district scenario, was developed for use in a graduate-level course in school finance. James Spencer had just been selected as the new superintendent of a low-income, 400-student, rural school district in need of many capital improvements.
openaire   +2 more sources

Bond Paths Are Not Chemical Bonds

The Journal of Physical Chemistry A, 2009
This account takes to task papers that criticize the definition of a bond path as a criterion for the bonding between the atoms it links by mistakenly identifying it with a chemical bond. It is argued that the notion of a chemical bond is too restrictive to account for the physics underlying the broad spectrum of interactions between atoms and ...
openaire   +3 more sources

ChemInform Abstract: Bond Paths and Bond Properties of Carbon‐Lithium Bonds.

ChemInform, 1987
Twenty-three organolithium compounds were analyzed by using the topological theory of molecular structure. The geometry of each compound was first optimized, making use of the 3-21G basis set. Then integrated lithium charges and quantities characterizing the carbon-lithium bond critical point, such as rho/sub c/ (C-Li), del/sup 2/rho/sub c/(C-Li), and ...
James P. Ritchie, Steven M. Bachrach
openaire   +3 more sources

Bonds and Bond Funds

2012
Bonds can play an important role in your quest for retirement income. As in many other financial decisions, however, they may force you to compromise between certainty and risk. Quite simply, bonds are IOUs. They represent debt obligations or sums of money owed to the purchaser, and they act as vehicles for companies or governments to raise capital ...
openaire   +2 more sources

Multicenter bonds, bond valence and bond charge apportionment

Journal of Molecular Structure: THEOCHEM, 1997
Abstract In the same way that the valence of an atom issues from the definition of bond index, we show here that the three-center bond index lends itself to the definition of a bond valence. Within the charge of a bond, we show that its self-charge (i.e., the amount of electrons kept by the atoms involved in the bond) is split in such a way that the ...
Mario Giambiagi, Marcelo de Souza Fortes, Myriam Segre de Giambiagi   +2 more
openaire   +2 more sources