Phosphorus Chemistry (4)

Phosphate condensation/hydrolysis

important in Biochemistry:

[R-O-(PO2)-O-PO3]3-(aq) + H2O ? [R-O-(PO3)]2-(aq)+ H2PO4-(aq)

ATP3- + H2O ? AMP2- + H2PO4-(aq)

?Go = -30.5 kJ/mol

Energy from - removal of e--e- repulsion in reactant (ATP)

- P-O bond converted to P=O bond

- more resonance stabilization in products

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