oblique latticesrectangular latticesThe design, synthesis and characterisation of some compounds whose constituent molecules have a completely new shape have been carried out. A total of eight different series/
Pure substances, such substances can either be elements, molecules, or compounds. The fundamental building blocks of matter are atoms. They comprise small particles that cannot be seen by the naked eyes. The main particles that constitute atoms are: The nucleus is a dense positively charged re...
Molecules can be made up of either one or more chemical elements. For example, an oxygen molecule comprises two atoms of the same element, thus a homonuclear molecule. On the other hand, the water molecule has three atoms where two atoms are from one element (hydrogen) and one from anothe...
There are two types of electrolyzers. In the first type, a graphite crucible serves as an anode, and a metal bar located in the center of the crucible is the cathode. The second type includes a metal crucible as the cathode and a graphite rod or a hollow perforated graphite tube as an...
a structure with two further ligand groups (probably two anions of the complex salts) in cis- or trans position; but also a distorted tetrahedral structure of symmetry D2d cannot be excluded a priori. Removal of the two weaker ligands (whereby the two stilbenediamine molecules are left in a ...
He atoms occupy a simple hexagonal lattice, while Mg and O occupy hcp lattices. The combination of He and either Mg or O forms a NiAs structure. The Mg and O atoms form an open structure that can accommodate linear chains of He atoms. Both Mg and O atoms have a coordination number of...
But in SiF4, each silicon atom coordinates only to its own four fluorines, and the whole thing is held together by weak van der Waals forces between the SiF4 molecules.) It's good to be able to tell if a bond is more ionic or covalent in character, but a strict distinction between ...
However, to date, attempts to experimentally observe either the strength of SOC or how it modifies the bulk band structure have been unsuccessful. By using bulk-sensitive nuclear magnetic resonance (NMR) spectroscopy combined with first-principles calculations, we reveal that 209Bi NMR isotropic ...
Synthetic compounds of this invention also have one or more of the following properties: they promote cell migration into porous lattices; they bind to collagen receptors; they induce metalloproteinases; they can down-regulate prolyl hydroxylase and collagen; they inhibit cell binding to collagen; and...
Since the co-crystallized composition exhibits a different thermogram, its crystalline properties are different from those of a simple mixture resulting in either greater or lesser polymerization reactivity and subsequent rate of color change upon exposure to actinic radiation or thermal annealing; whereas...