... indicate theformationof1:2 metal to ligand complexes with empiricalformulae [CuL,!and!NiL,!(HL: thiosemicarbazone). The Cu(1I) and Ni(1I) complexes are fourcoordinateandsquare planar geometry ... planar geometry in which the ligands behave as bidentate chelating agentsin the uninegatively charged form. The biological activityofthiosemicacbazones and complexesagainst the bacteria.fungi ... TCIPchi Hoah9C, T. 46 (2), T& quot;.159-164,2008TONG HQP, NGHIEN cuu CAU TRUCvATHAMDOHO ~T TiNH? A' SINH H9CCUA CAC PHl1C CHAT Cu(II), Ni(lI) VOl XITRONENLALvAMENTON THIOSEMICACBAZONDellToasoan21-6-2007PHANTH~HONGTUYET',voDANG0<)',NGUYENHOADU''KhoaHOGhoc,...