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

• 作 者: Gus J.Palenika 胡盛志
• 机 构: Chemistry Department,The University of Florida,Department of Chemistry,Institute of Physical Chemist
• 出 处: 结构化学
• 发表日期: 2011年12期
• 关键词: complexes Cambridge correctly searching valence bonds entries length preliminary

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.

The influence of the lone pair of electrons in thallium complexes is analyzed using the bond valence sum method. 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. 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 the analyzes of homoleptic Tl-O, Tl-N, and heteroleptic Tl-O and-N metal organic complexes. The R R 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.