Abstract: The shake-up peaks are observed on XPS spectra of the coordination complex PAAm-CuCl₂ and CuCl₂·2H₂O and they have a distance to Cu²⁺2_p3/2 shoulder or main peak (ΔE_s2=8.7eV or ΔE_s=8.6eV)respectively.No shake-up peak in XPS spectrum was found for Cu(Ⅱ)-PVA complex.It is concluded that the coordination bond in PAAm-CuCl₂ is formed in result of the acceptance of sp³ hybrid orbitals with the nonpair electrons partially transfered from N of four C-N units of PAAm,whereas in Cu(Ⅱ)-PVA it is formed in result of the acceptance of dsp² hybrid orbitals with partial transfered nonpair electrons on the side O in four chain units of PVA.The ratio of coordination betvveen Cu²⁺ and PAAm or PVA is thus one to four,as was determined for Cu²⁺ and PAAm by electric conductivity measurement.

Key words: Cu(Ⅱ)-polymer complex, polyacrylamide, polyvinyl alcohol, coodination num-ber, XPS