Bond Valence Sum Analysis of Tl(Ⅰ) and Tl(Ⅲ) Complexes with O and N Donors

【摘要】 The influence of the lone pair of electrons in thallium complexes is analyzed using the bond valence sum method.Bond length data for metal-organic Tl complexes were obtained from the Cambridge Structural Database(CSD),and problems with searching the CSD file for Tl complexes are discussed.The recommended R0 values for Tl(Ⅰ)-O of 2.162 ,Tl(Ⅲ)-O of 2.016 ,Tl(Ⅰ)-N of 2.286 ?,and for Tl(Ⅲ)-N of 2.014  used with b = 0.37 were derived from analyses of homoleptic Tl-O,Tl-N,and heteroleptic Tl-O and-N metal organic complexes.These R0 values can be used to assign correctly the oxidation state of Tl in complexes containing any combination of Tl-O or Tl-N bonds.Examples of questionable oxidation states for Tl complexes are given.The R0 value for Tl(Ⅲ)-Cl of 2.300  was also determined.更多还原

【Abstract】 The influence of the lone pair of electrons in thallium complexes is analyzed using the bond valence sum method.Bond length data for metal-organic Tl complexes were obtained from the Cambridge Structural Database(CSD),and problems with searching the CSD file for Tl complexes are discussed.The recommended R0 values for Tl(Ⅰ)-O of 2.162 ,Tl(Ⅲ)-O of 2.016 ,Tl(Ⅰ)-N of 2.286 ?,and for Tl(Ⅲ)-N of 2.014  used with b = 0.37 were derived from analyses of homoleptic Tl-O,Tl-N,and heteroleptic Tl-O and-N metal organic complexes.These R0 values can be used to assign correctly the oxidation state of Tl in complexes containing any combination of Tl-O or Tl-N bonds.Examples of questionable oxidation states for Tl complexes are given.The R0 value for Tl(Ⅲ)-Cl of 2.300  was also determined.更多还原