A Simple Valence Bond Description of Coordinate Bonds

16 5 A SIMPLE VALENCE BOND DESCRIPTION OF COORDINATE BONDS 

Atomic Orbitals Hybrid Type Number of Orbitals Structure 

In dsp2 the dp-/ orbital is used In sp2d2 and d2sp3 the d -f and dp orbitals are used.  

When Zn2+ forms a complex such as [Zn(NH3)4]2+, it is easy to rationalize the bonding in terms of hybrid orbitals. Zn2+ has a d () configuration, but the 4s and 4p orbitals are empty. Therefore, a set of four empty sp3 hybrids can result. As shown next, four orbitals can accept four pairs of electrons that are donated by the ligands. 

Likewise, it is easy to rationalize how Ag+ (a d10 ion) can form a linear complex with two ligands like NH,. 

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A Simple Valence Bond Description of Coordinate Bonds 593... 

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