The preparations are reported of a series of cobalt(II) and nickel(II) compounds with quadridentate dianionic ligands related to 1,2-bis-(o-iminobenzylideneamino) ethane. This new series of planar [MIIN4] compounds includes species with electron-withdrawing and electron-donating substituents, and various bridging central chelate rings in place of the dimethylene bridge of the parent compound {5-Cl on the o-iminobenzaldehydo moiety; Me or Ph on the azomethine carbon; and CH2CHMe, z.sbnd;CH2CMe2, (CH2)2−, (CH2)3−, and 3-NO2 and 4-NO2-o-phenylene for the chelate ”bridge“}. Half-wave oxidation potentials have been measured for most of the compounds and these show that electron-withdrawing substituents raise E12 while electron-donating ones lower it - apparently independently of the position of the substituent on the ligand. All solid compounds were characterised by their X-ray powder diffraction patterns (and i.r. spectra), a few were dimorphic, and several also gave crystalline solvates when recrystallised from DMF. About 60% of the solids can be classified into two structural groups from the X-ray diffraction patterns. The cobalt(II) compounds have a low intensity band at ∼ 10 x 103 cm−1 which in one case moves by 1.5 x 103 cm−1 between the solid state and solution. This change is associated with conformational changes in the molecule. In addition to the monomeric species, a cationic nickel(II) dimer of a mono-de-protonated ligand has been characterised.

AbstractDie Komplexe (I) werden ohne vorherige Isolierung des Liganden, meist durch Reaktion des o‐Aminobenzaldehyds mit dem Diamin in Methanol und dem Metallacetat dargestellt.

Chemischer InformationsdienstVolume 4, Issue 9 Organoelement Compounds ChemInform Abstract: DIE PROTONIERUNG EINIGER FLUOROLEFIN-KOMPLEXE VOM PLATIN(0) R. D. W. KEMMITT, R. D. W. KEMMITTSearch for more papers by this authorB. Y. KIMURA, B. Y. KIMURASearch for more papers by this authorG. W. LITTLECOTT, G. W. LITTLECOTTSearch for more papers by this authorR. D. MOORE, R. D. MOORESearch for more papers by this author R. D. W. KEMMITT, R. D. W. KEMMITTSearch for more papers by this authorB. Y. KIMURA, B. Y. KIMURASearch for more papers by this authorG. W. LITTLECOTT, G. W. LITTLECOTTSearch for more papers by this authorR. D. MOORE, R. D. MOORESearch for more papers by this author First published: February 27, 1973 https://doi.org/10.1002/chin.197309427AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat No abstract is available for this article. Volume4, Issue9February 27, 1973 RelatedInformation

The zerovalent olefin complexes Pt(C2F4)L2, (L = PPh3, AsPh3, PEt2Ph, PMePE2, or PBu3; L2 = 2,2′-bipyridine) readily react with trifluoroacetic acid to give a convenient synthesis of the tetrafluoroethyl complexes, Pt(OCOCF3)(CF2CF2H)L2. Similar reactions occur with hexafluoropropene, trifluoroethylene, chlorotrifluoroethylene, bromotrifluoroethylene and tetrachloroethylene complexes. Reactions of some of the complexes with hydrogen chloride, tertiary butyl chloride and mercury(II) chloride have also been examined. The nature of the ligand L appears to have a large effect on the reactivity of the tetrafluoroethylene complexes with hydrogen chloride.