Photosensitized isomerization of norbornadiene to quadricyclane with (arylphosphine)copper(I) halides

Structure of chloro[1,1,1-tris(diphenylphosphinomethyl)ethane]copper(I)

“…Arylphosphine complexes of copper(I) halides have shown excellent properties as photochemical triplet sensitizers (Fife, Moore & Morse, 1984a, 1985. However, the monodentate ligands have shown considerable ligand dissociation in solution (Fife, Moore & Morse, 1984b).…”

Interplay of thermochemistry and Structural Chemistry, the journal (volume 17, 2006) and the discipline

“…In the following paper by Dehghanpour, Mahmoudkhani, and Amirnasr [152] synthesis and characterization of new mixed ligand complexes [Cu(Phca 2 en)(PPh 3 )X] (Phca 2 en = 1,2-bis(b-phenylcinnamaldimino)ethane, X = Cl, Br, I, NCS, N 3 ) are reported, species which are potentially applicable for catalytic processes, photosensitization of isomerization reactions, light harvesting studies and the design of supramolecular arrays [153][154][155][156]. Consider the b-phenylcinnamaldehyde precursor.…”

Reactions of Dipyridylketone With Group 8 Metal Carbonyls in Different Media

“…According to the spectroscopic data, coordination about Os is pseudooctahedral, with two N atoms from the pyridyl rings, three C atoms from the carbonyl groups, one O atom from the methanolate group occupying the coordinating sites. The distortion from octahedral geometry in the complex is due to the tridentate binding of hydroxydi-2-pyridylethanolato-N,O,N to form a sixmembered metallocyclic ring forming [Os(CO) 3 ( 3 -dpkO,Oeth)], Scheme 2, and due to Jahn-Teller effect of the low-spin d 7 , t 2g 6 e g 1 , arrangement.…”

“…In the bidentate mode, delocalization of electrons through the pyridine rings and the keto group result in a wide range of charge species from a neutral precursor and a low energy metal to ligand charge transfer (MLCT) all of which are important in electronic transfer processes and catalysis [5]. It has been found that copper(I)-PPh 3 -dpk complexes are efficient photocatalysts for norbornadiene-quadricyclane conversion [6], which is important as a solar energy storage process [7,8]. On the other hand, the metal promoted hydration of dpk has been of interest for some time since the ligand has the ability to undergo a reaction after initial coordination to a transition metal ion [9][10][11][12][13].…”