183022-64-2Relevant academic research and scientific papers
Conjugated pyridines with an end-capping ferrocene
Lin, Jiann T.,Wu, Jiann Jung,Li, Chyi-Shiun,Wen, Yuh S.,Lin, Kuan-Jiuh
, p. 5028 - 5034 (1996)
This study reports the synthesis of new pyridyl ligands incorporating an alkyne entity with an end-capping ferrocenyl moiety: 1-(ferrocenylethynyl)-4-((4-pyridyl)ethynyl)benzene (FEPEB), 1-ferrocenyl-6-(4-pyridyl)hexatriyne (FPHT), and 1-ferrocenyl-4-(4-pyridyl)-butadiyne (FPBD). The complexes W(CO)4(L)(FEPEB) (L = CO, PPh3, P(OMe)3, PMe3), W(CO)4(L)(FPHT) (L = CO, PPh3, P(OMe)3, PMe3), and W(CO)5(FPBD) are obtained by ligating FEPEB, FPHT, and FPBD to W(CO)4(L)(THF). The energy of tungsten metal to pyridyl π* charge transfer (MLCT) depends on both the pyridyl ligand and the ancillary ligand, L. Treating FPHT and FPBD with MeI causes N-methylpyridinium derivatives to form, which exhibit a strong low-lying charge-transfer band. As a comparative study, the complexes 1-(ferrocenylethynyl)-4-((4-nitrophenyl)ethynyl)-benzene (FENEB) and 1-(ferrocenylethynyl)-4-((4-aminophenyl)ethynyl)benzene (FEAEB) have also been synthesized. X-ray analysis has been employed to examine the structures of 1-(ferrocenylethynyl)-4-ethynylbenzene, W(CO)4(PPh3)(FEPEB), W(CO)5(FPHT), and 1,8-diferrocenyloctatetrayne.
