Ferrichrome is a cyclic hexa-peptide that forms a complex with iron atoms. It is a siderophore composed of three glycine and three modified ornithine residues with hydroxamate groups [-N(OH)C(=O)C-]. The 6 oxygen atoms from the three hydroxamate groups bind Fe(III) in near perfect octahedral coordination. Why does the Fe3+* prefer to bind to the hydroxamate groups? HN NH OH HN NH 'N' OH OH

Trimethylphosphine, P(CH3)3, can act as a ligand by donating the lone pair of electrons on the phosphorus atom. If trimethylphosphine is added to a solution of nickel(Il) chloride in acetone, a blue compound that has a molecular mass of approximately 270 g and contains 21.5% Ni, 26.0% Cl, and 52.5% P(CH3)3 can be isolated. This blue compound does not have any isomeric forms. What are the geometry and molecular formula of the blue compound?

When the anion of the amino acid glycine, H2NCH2CO2-(gly-), reacts with cobalt(III) oxide, both the N and an O atom of gly-coordinate and two Co(III) nonelectrolyte mer and fac isomers of [Co(gly)3] are formed. Sketch the two isomers.

A dark blue complex is formed when triiodide is combined with starch. According to the equation: A. Is (aqg) + Starch (ag)→I2 - .Starch (ag) В. Is Starch (np + 25:0; (m)-31 (ng + S.Os (mo +Starch (w) C. Is (ag) + Starch (ah)→I3 - .Starch (aq) D. Is-.Starch (ag) -→ 31 (ng) + S406 2- (nq) +Starch (ag)