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A chemical compound is a chemical substance composed of many identical molecules (or molecular entities) containing atoms from more than one chemical element held together by chemical bonds.
While at University of Michigan, Omar M. Yaghi (currently at UCBerkeley) and Adrien P Cote published the first paper of COFs in 2005, reporting a series of 2D COFs. [5] They reported the design and successful synthesis of COFs by condensation reactions of phenyl diboronic acid (C 6 H 4 [B(OH) 2] 2) and hexahydroxytriphenylene (C 18 H 6 (OH) 6).
A network solid or covalent network solid (also called atomic crystalline solids or giant covalent structures) [1] [2] is a chemical compound (or element) in which the atoms are bonded by covalent bonds in a continuous network extending throughout the material.
A covalent bond forming H 2 (right) where two hydrogen atoms share the two electrons. A covalent bond is a chemical bond that involves the sharing of electrons to form electron pairs between atoms.
Lewis structure for molecular hydrogen.Note depiction of the single bond. Lewis structure for methane.Note depiction of the four single bonds between the carbon and hydrogen atoms.
In coordination chemistry, a coordinate covalent bond, [1] also known as a dative bond, [2] dipolar bond, [1] or coordinate bond [3] is a kind of two-center, two-electron covalent bond in which the two electrons derive from the same atom.
Non-covalent metallo drugs have been developed. For example, dinuclear triple-helical compounds in which three ligand strands wrap around two metals, resulting in a roughly cylindrical tetracation have been prepared. These compounds bind to the less-common nucleic acid structures, such as duplex DNA, Y-shaped fork structures and 4-way junctions ...
Compound engine, a steam engine in which steam is expanded through a series of two or three cylinders before exhaust; Turbo-compound engine, an internal combustion engine where exhaust gases expand through power-turbines