Showing papers on "Norbornadiene published in 1986"
63 citations
TL;DR: In this paper, NBD was displaced from PtMe2(NBD) by a range of ligands L to form cis-PtMe2L2 (L = pyridine (py), NH3, dimethylsulfoxide (DMSO); L2 = 2,2′-bipyridyl (bipy), ethylenediamine (en), N,N,N′, N′,N-tetramethylethylenedienine (tmen) - but not L = acetonitri
47 citations
42 citations
35 citations
TL;DR: Norbornene and norbornadiene have been successfully metallated with the complex BuLi · t-BuOK in tetrahydrofuran and a number of derivatives prepared by reaction of the metallic intermediates with electrophilic reagents.
Abstract: Norbornene and norbornadiene have been successfully metallated with the complex BuLi · t-BuOK in tetrahydrofuran and a number of derivatives prepared by reaction of the metallic intermediates with electrophilic reagents.
33 citations
TL;DR: Les acidites en phase gazeuse de quelques alcenes et dienes mono-and bicycliques sont mesurees dans une etude modele de l'homoaromaticite anionique as mentioned in this paper.
Abstract: Les acidites en phase gazeuse de quelques alcenes et dienes mono- et bicycliques sont mesurees dans une etude modele de l'homoaromaticite anionique
33 citations
TL;DR: In this paper, a trigonal arrangement of two phosphines and a π-bonded thiophene around the Rh atom was determined by X-ray diffraction.
25 citations
25 citations
24 citations
TL;DR: In this paper, β-cyclodextrin (β-CD) with [(L)RhCl]2(L = norbornadiene or cyclo-octa-1,5-diene, cod) and 1:1 inclusion compounds were obtained by the reaction of β-CD with (cod)PtX2(X = Cl, Br, or I) in high yields.
Abstract: 2 : 1 (cyclodextrin : guest) inclusion compounds were obtained in high yields by the treatment of β-cyclodextrin (β-CD) with [(L)RhCl]2(L = norbornadiene or cyclo-octa-1,5-diene, cod) and 1:1 inclusion compounds were obtained by the reaction of β-CD with (cod)PtX2(X = Cl, Br, or I) in high yields, while γ-CD formed 1:1 inclusion compounds with (cod)PtX2(X = Br or I); the formation of inclusion compounds is selective.
23 citations
TL;DR: In this article, the σ radical cations of most typical bicycloalkanes such as norbornane and bicyclo[2, 2,2] octane are radiolytically produced at 4 K in halogenocarbon matrices and are studied by ESR spectroscopy.
TL;DR: The bicyclic and tricyclic organopalladium compounds prepared via π-allyl and vinylpalladium additions to norbornene and norbornadiene respectively undergo cyclization upon reaction with carbon monoxide in methanol to afford an interesting variety of polycyclic ketones as mentioned in this paper.
01 Mar 1986
TL;DR: In this paper, the authors propose un mecanisme de reaction for the reaction of semiconducteurs to photochimique d'energies, i.e.
TL;DR: Wasserlosliche Quadricyclan carbonsauren (I), deren Herstellung nach bekannten Verfahren beschrieben ist, isomerisieren bei Zusatz des Co- Katalysators (II) unter starker Warmeentwicklung zu den Norbornadienen (III); in gleicher Weise reagieren die Dicarbonsaurederivate (IV) zu the Norbornadelienen(V) as mentioned in this paper
Abstract: Wasserlosliche Quadricyclan-carbonsauren (I), deren Herstellung nach bekannten Verfahren beschrieben ist, isomerisieren bei Zusatz des Co- Katalysators (II) unter starker Warmeentwicklung zu den Norbornadienen (III); in gleicher Weise reagieren die Dicarbonsaurederivate (IV) zu den Norbornadienen (V).
TL;DR: In this article, it was shown that a naphthalene derivative of quadricyclane isomerizes inversely to the corresponding norbornadiene derivative via the triplet in a very high yield, and the cycloreversion has been substantiated to be an adiabatic process.
Abstract: Photochemically induced interconversion between norbornadiene and quadricyclane has been the focus of considerable attention in connection with the storage of solar energy. A variety of sensitization methods have been applied to the valence isomerization of norbornadiene and its derivatives, including direct photolysis, triplet sensitization, complexation with metal ions, and donor-acceptor interaction. For triplet excitation, it has been reported that norbornadiene in a triplet state isomerizes efficiently to a ground state of quadricyclane through a biradicaloidal intermediate on the basis of photochemical investigation of the corresponding cyclic azoalkanes. In the present paper, on the other hand, the authors have found that a naphthalene derivative of quadricyclane isomerizes inversely to the corresponding norbornadiene derivative via the triplet in a very high yield, and the cycloreversion has been substantiated to be an adiabatic process by convincing experimental supports. Furthermore, it might be pointed out that the conformation of the olefinic moiety of the norbornadiene in the relaxed triplet state, i.e., planar or twisted, is one of the important factors which control the reaction mechanism, i.e., adiabatic or biradicaloidal.
TL;DR: Bis(1,2-diphenyl-1, 2-ethylenedithiolato)nickel(0) (1a) reacts with quadricyclane (Q) to give a 1:1 adduct which has the same structure as that of the adduct between 1a and norbornadiene (NBD) as discussed by the authors.
Abstract: Bis(1,2-diphenyl-1,2-ethylenedithiolato)nickel(0) (1a) reacts with quadricyclane (Q) to give a 1:1 adduct which has the same structure as that of the adduct between 1a and norbornadiene (NBD). Q reacts with 1a much faster than NBD. The adduct is thermally stable but photosensitive to dissociate into 1a and NBD.
TL;DR: Water-soluble quadricyclane derivatives were stable in an aqueous sodium carbonate solution, but addition of a catalytic amount of water solvable cobalt porphyrin complexes (3) induced rapid and quantitative isomerization of (1) to norbornadiene derivatives (2) under release of heat as mentioned in this paper.
Abstract: Water-soluble quadricyclane derivatives (1) were stable in an aqueous sodium carbonate solution, but addition of a catalytic amount of water-soluble cobalt porphyrin complexes (3) induced rapid and quantitative isomerization of (1) to norbornadiene derivatives (2) under release of heat. Insoluble catalysts (4) prepared by adsorption of Co-TPP or Co-Pc on activated carbon were similarly active as the soluble analogues. They were stable enough to keep high activities for recycling use.
TL;DR: In this article, the effect of [Rh(NBD)L 2 ] + (L = P(p-XC 6 H 4 ) 3 with X = Me, H, Cl, F and P(C 6H 5 ) 2 (p-MeOC 6H 4 )) complexes on the hydrogen transfer from 2-propanol to ketones and aldehydes is studied.
TL;DR: In this paper, the mechanism of the cyclic voltammetry at a rotating platinum electrode has been investigated with respect to the oxidative cleavage of other binuclear organotransition-metal complexes.
Abstract: Cyclic voltammetry shows that [Pd2(µ- PhC2Ph)(η-C5Ph5)2](1) undergoes one one-electron reduction and two one-electron oxidations at a platinum electrode. Chemical oxidation of (1) with AgPF6 in toluene gives the paramagnetic salt [Pd2(µ-PhC2Ph)(η-C5Ph5)2][PF5] which reacts with P-donor ligands or dienes to give [PdL2(η-C5Ph5)][PF5](2, L2= Ph2PCH2CH2PPh2, cyclo-octa-1,5–diene, cyclo-octatetraene, norbornadiene, or dibenzo[a,e]cyclo-octene) and (1). The mechanism of the cleavage of [Pd2(µ-PhC2Ph)(η-C5Ph5)2]+(1)+ has been probed by voltammetry at a rotating platinum electrode; the implications of this mechanism with respect to the oxidative cleavage of other binuclear organotransition-metal complexes is discussed.
TL;DR: In this paper, the valence isomerization via a radical cation of quadricyclane to norbornadiene on the surface of illuminated CdS and ZnO is described.
TL;DR: The crystal structure and absolute configuration of (bicyclo[2.2.1]hepta-2,5-diene)[N,N-dimethyl-1(R)-(o-(bis(tert-butyl)phosphino)phenyl)ethylamine]rhodium(I) perchlorate, [Rh(R-dibutphos)(C7H8)]C...
Abstract: The crystal structure and absolute configuration of (bicyclo[2.2.1]hepta-2,5-diene)[N,N-dimethyl-1(R)-(o-(bis(tert-butyl)phosphino)phenyl)ethylamine]rhodium(I) perchlorate, [Rh(R-dibutphos)(C7H8)]C...
TL;DR: In this paper, Cationic rhodium (I) complexes of the type [(NBD)RhL2]- ClO4 − (NBD, norbornadiene; L, triphenyl phosphine or diphenylosphino ethane) have been studied as catalysts for the isomerization of methyl linoleate and safflower oil.
Abstract: Cationic rhodium (I) complexes of the type [(NBD)RhL2]+ ClO4
− (NBD, norbornadiene; L, triphenyl phosphine or diphenyl phosphino ethane) have been studied as catalysts for the isomerization of methyl linoleate and safflower oil. The catalysts gave very good yields of conjugated products with both oil and methyl linoleate. Isomerization could be carried out under very mild conditions (55–65 C, 1 atm N2). Although the catalyst undergoes transformation in the course of the reaction, it maintains its catalytic activity. In fact, the catalysts isolated from the reaction with safflower oil were recycled with practically no loss of activity.
TL;DR: In this paper, the X-ray structural analysis of the complexes cis-Mo(CO) 2 (Ph 2 P(CH 2 ) 3 PPh 2 ) 2 (n = 1, 2, 3) is presented.
TL;DR: The organometallic anion [(C5H5)Co{P(O)(OC2H5)-3]− reacts as a tridentate oxygen ligand L− with [{RhCl(diolefin)}2] (dio-lefin = 1,5-cyclooctadiene, norbornadiene and tetrafluorobenzobarrelene, trimethyltetrafluorsobarbenobarrelenes, duroquinone) and [LRh(C2H4)2] in hexane or in
TL;DR: In this article, the coordinating properties of the ligands L 1 (= MeP(SMe) 2 ) and L 2 (= CF 3 P(SME) 2 ] have been studied by synthesis and spectroscopic investigations (IR, NMR, MS).