coordinate bond

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co·or·di·nate bond

(kō-ôr′dn-ĭt, -āt′)
A covalent chemical bond between two atoms that is produced when one atom shares a pair of electrons with another atom lacking such a pair. Also called semipolar bond.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
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One atom of Ti has chemical bonds to four oxygen atoms and could have coordinate bonds between d[d sub.z.](2) empty orbital of Ti and lone pair of N atoms of DEOA.
Ligands in general may attach to the metals with coordinate bonds involving the lone pair of electrons in: 0,: N, or: [Cl.sup.-].
The directionality of the coordinate bonds is an important feature in the structure of hemes, cobalamins, chlorophylls, and related structures.

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