Coordination Compound
Coordination compound
A coordination compound is formed when groups of atoms, ions, or molecules chemically bond with each other by donating and accepting pairs of electrons. Groups donating electron pairs are called ligands. They are usually Lewis bases. Groups accepting electron pairs are often transition metal cations.
They are usually Lewis acids. Chemical bonds formed in this way are called coordinate-covalent, or dative bonds. As in any covalent bond, two electrons are shared between transition metal and ligand. But in a coordination compound, both electrons come from a pair found on the ligand (Figure 1).
The metal cation simply acts as the electron pair acceptor, itself donating no electrons to the bond. Because of the complicated nature of these arrangements, coordination compounds are often called coordination complexes or simply complexes.
It is most common to find six ligands coordinated to a single metal cation. The coordination number is then six. Think of ligands as bees swarming about and stinging a victim. The ligand-bee's stinger is its lone pair or non-bonding pair of electrons. These special ligand-bees attack their victim in groups of six, although ligand groups of four and other numbers do occur. Six coordination produces the shape of an eight-sided figure or octahedron. Four coordination produces one of two shapes, a flat square planar or a four-sided tetrahedron.
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… calcium from their diet properly. Just something I found from my coordination compounds lectures. Source: Atkins RW and Jones LL, Chemical Principles…
… and the pigment fraction was identified as a melamine coordination compound of azobarituric acid 1:1 Nickel complex […]. [3.3] In opposition appeal proceedings…
You need to be familiar with the charges ligands have. All ligands will either be neutral or carry some negative charge (some can have multiple negative charges). Halogens are super easy as they are a
5 each EDTA bond twice; and one Br
Au – gold likes to be neutral
6 and +3.Option 4: 6 and +3.
Since the ethylenediamine molecules have two co-ordination sites per molecule…and also contribute no charge…that’s four co-ordinatting groups contributed to the cobal
Pt(NH3)Cl5-
Cl = -1 and there are 5 of these
NH3 = +1 there is one of these
Pt = +x there is one of these
the total charge on the coordination ion = -1
x + 1 – 5 = -1
x = +3
looking at the compound ca
+2 4+2 4
[Pt(NH3)4 Cl2]Cl2 is the formula. It gives three ions in water
Pt(NH3)4 Cl2] ^2+ and two Cl^- ions
www.mindbites.com for full video
VBT-2
concept builder
Coordination compounds and Organometallics – These concepts are explained in this video
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Infrared and Raman Spectra of Inorganic and Coordination Compounds, Two Volume Set
This proven book introduces the basics of coordination, solid-state, and descriptive main-group chemistry in a uniquely accessible manner, featuring a
The Sixth Edition of this classic work comprises the most comprehensive and current guide to infrared and Raman spectra of inorganic, organometallic,
At the heart of coordination chemistry lies the coordinate bond, in its simplest sense arising from donation of a pair of electrons from a donor atom
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