cis,cis-1,3,5-Tris(diphenylphosphino)cyclohexane (tdppcy). A new tripodal phosphine that forms metal complexes with adamantane-type structures. rystal structure of Ir(tdppcy)Cl3
摘要:
The novel tridentate phosphine cis,cis-1,3,5-tris(diphenylphosphino)cyclohexane (tdppcy) (3) has been synthesized. Treatment of tdppcy with Mo(C7H8)(CO)3 and lr(PPh3)2(CO)CI yields octahedral Mo(tdppcy)(CO)3 (4) and trigonal-bipyramidal Ir(tdppcy)(CO)Cl.(5), respectively. Compound S is transformed into either Ir(tdppcy)(CO)H (6) or lr(tdppcy)(CO)(H)2+ (7) by treatment with NaBH4 in refluxing THF. Complex 5 can be oxidized by dichloromethane or Cl2 to the trichloro complex lr(tdppcy)Cl3 (8), which can be converted into the dihydride Ir(tdppcy)(H)2Cl (9) by treatment with NaBH4 in THF. The dynamic behavior of the highly fluxional pentacoordinate complexes 5 and 6 has been studied by VT P-31{H-1} NMR spectroscopy. An X-ray diffraction study has been carried out on 8 . 3CH2Cl2.
cis,cis-1,3,5-Tris(diphenylphosphino)cyclohexane (tdppcy). A new tripodal phosphine that forms metal complexes with adamantane-type structures. rystal structure of Ir(tdppcy)Cl3
摘要:
The novel tridentate phosphine cis,cis-1,3,5-tris(diphenylphosphino)cyclohexane (tdppcy) (3) has been synthesized. Treatment of tdppcy with Mo(C7H8)(CO)3 and lr(PPh3)2(CO)CI yields octahedral Mo(tdppcy)(CO)3 (4) and trigonal-bipyramidal Ir(tdppcy)(CO)Cl.(5), respectively. Compound S is transformed into either Ir(tdppcy)(CO)H (6) or lr(tdppcy)(CO)(H)2+ (7) by treatment with NaBH4 in refluxing THF. Complex 5 can be oxidized by dichloromethane or Cl2 to the trichloro complex lr(tdppcy)Cl3 (8), which can be converted into the dihydride Ir(tdppcy)(H)2Cl (9) by treatment with NaBH4 in THF. The dynamic behavior of the highly fluxional pentacoordinate complexes 5 and 6 has been studied by VT P-31{H-1} NMR spectroscopy. An X-ray diffraction study has been carried out on 8 . 3CH2Cl2.
Molybdenum dinitrogen complex supported by a cyclohexane-based triphosphine ligand and dmpm
作者:Thomas Weyrich、Jan Krahmer、Tobias A. Engesser、Christian Näther、Felix Tuczek
DOI:10.1039/c8dt04738c
日期:——
We report the first molybdenum dinitrogen complex supported by a cyclohexane-based triphosphine ligand. By employing several spectroscopic methods we are able to pinpoint the pentaphosphine environment and evaluate the activation of the dinitrogen ligand. Furthermore, we conduct protonation experiments and obtain spectroscopic evidence for the formation of a hydrazido-species.