Consider the coordination compound, Na2[Pt(CN)4]. The Lewis acid is
A
[Pt(CN)4]2-
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B
Na+
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C
Pt2+
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D
Pt
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E
CN-
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Solution
The correct option is C Pt2+
Lewis acid => an electron acceptor
Lewis base => an electron donor
A coordination complex is the product of a lewis acid-base reaction in which neutral molecules or anions (called ligands) bond to a central metal atom (or ion) by coordinate covalent bonds. Ligands are lewis bases and they contain at least one pair of electrons to donate to a metal atom/ion.