Co-ordination chemistry of higher oxidation states. Part 38. Synthesis, spectroscopic and electrochemical studies of some trans-dihalogenoosmium complexes. Crystal structure of trans-[Os(PMe3)4Cl2]BF4
作者:Neil R. Champness、William Levason、Roy A. S. Mould、Derek Pletcher、Michael Webster
DOI:10.1039/dt9910002777
日期:——
trans-[OsL4X2]BF4(L = PMe3 or AsMe3), but formation of trans-[OsL4X2]BF4(L = PMe2Ph, SbPh3 or py) and cis-[Os(PMe2Ph)4Cl2]BF4 requires HNO3 as oxidant. Use of concentrated HNO3 gives trans-[OsL4X2]2+(L = PMe3, PMe2Ph or AsMe3) in solution, but these have not been isolated. The complexes have been characterised by IR, UV–VIS, and NMR spectroscopies, and the effect of stereochemistry and L and X upon the OsII–OsIII
复合物的反式- [OS(PME 3)4 X 2 ](X = Cl或Br)已从[OS(PPH获得3)3 X 2 ]和PME 3,和反式[OSL - 4 X 2 ] [L = PME 2 PH,ASME 3,灰飞虱3或吡啶(PY)]通过还原适当的锇(III在L的存在下)配合物配合物的顺式- [OS(PR 3)4 X 2 ]是由异构化形成该反式在氯化溶剂中的类似物,以及其他方式。(II)配合物的空气氧化会生成反式-[OsL 4 X 2 ] BF 4(L = PMe 3或AsMe 3),但会形成反式-[OsL 4 X 2 ] BF 4(L = PMe 2 Ph, SbPh 3或py)和顺式[Os(PMe 2 Ph)4 Cl 2 ] BF 4需要HNO 3作为氧化剂。使用浓HNO 3可使反式-[OsL溶液中存在4 X 2 ] 2+(L = PMe 3,PMe 2 Ph或AsMe 3),但尚未分离。通