Charge-transfer complexes thumb|upright=1.8|right|I2•PPh3 charge-transfer complexes in CH2Cl2. From left to right: (1) I2 dissolved in dichloromethane – no CT complex. (2) A few seconds after excess PPh3 was added – CT complex is forming. (3) One minute later after excess PPh3 was added, the CT complex [Ph3PI]+I− has been formed. (4) Immediately after excess I2 was added, which contains [Ph3PI]+[I3]−.
charge-tRansFeR CompleXes tHuMB|uPriGhT=1.8|rigHt|I2•ppH3 chArge-Transfer COMPLexes in ch2cl2. from lefT To rigHT: (1) i2 DisSOlvEd in diChloromEthanE – nO ct cOmplEx. (2) a FEw seconds AftER excEss pPh3 Was ADDEd – ct Complex Is forming. (3) one MinutE LAteR AftEr exceSs ppH3 was addEd, ThE Ct coMplex [ph3pi]+i− hAs beeN forMed. (4) ImmedIaTelY afteR Excess i2 was ADded, WhIcH contAinS [ph3pi]+[I3]−.