Question

which is more stable cu+1 or cu+2

Answer 1

more sitable is cu+2

Answer 2

hey

here is your answer

This a quick answer, and I will have to come back and revise this later today. With ligands that are nitrogen donors etc Cu(I) complexes tend to have Td symmetry and Cu(II) complexes form 5 coordinate square planar complexes.  The d10 Cu(I) complexes have electrons which will interact repulsively with Lewis bases, and depending on the ligands ie pi acceptors that can pull electron density away from the metal center impacts the  ligand exchange kinetics.  One has to deal with electron-electron  repulsion in the metal centered orbitals.  Cu(II) complexes with a d9 configuration have reduced electron repulsion as an electron has been removed from an anti-bonding orbital, and a fifth ligand increases the LFSE in the Cu(II) complex.   I realize that the explanation is not complete, and I will return to this response later today.

hope its help you

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