consider-the-reaction-of-glycinate-ion-h2nch2coo-with-co3-to-produce-cogly33i-wh

Question

Consider the reaction of glycinate ion (H₂NCH₂COO^–) with Co³⁺ to produce [Co(gly)₃]³⁺.

(i) Which is the Lewis acid and the Lewis base in the reaction?

(ii) Which are the ligands and donor atoms in the complex?

(iii) Determine the coordination number and the geometry of the central metal ion.

Accepted Answer

i. Lewis acid: Co³⁺; Lewis base: glycinate ion

ii. Ligands: glycinate ions; Donor atoms: N and O

iii: Coordination number: 6; Geometry: Octahedral

Answer

i. Lewis acid: glycinate ion; Lewis base: Co³⁺

ii. Ligands: glycinate ions; Donor atoms: N, O

iii: Coordination number: 3; Geometry: trigonal planar

Answer

i. Lewis acid: glycinate ion; Lewis base: Co³⁺

ii. Ligands: glycinate ions; Donor atoms: N

iii: Coordination number: 3; Geometry: trigonal planar

Answer

i. Lewis acid: Co³⁺; Lewis base: glycinate ion

ii. Ligands: glycinate ions; Donor atoms: O and O

iii: Coordination number: 6; Geometry: Octahedral