| 1 | Author
| Heinz Hoberg, Klaus Radine, Carl Krüger, MariaJ. Romão | Requires cookie* | | Title
| Synthese neuer Phosphan-Nickel(I)-KompIexe und Kristallstruktur von /# 3 Jodo-fra-^-iodo-cycIotris(triphenylphosphan-nickel), (TPP) 3 Ni 3 I 4 Synthesis of New Phosphine Nickel(I) Complexes and Crystal Structure of // 3 -Iodo-m's-//-iodo-cyclotris(triphenylphosphine Nickel), (TPP) 3 Ni 3 I 4  | | | Abstract
| Synthesis and properties of the new nickel(I) complexes (COD)Ni(TPP)I (3) and (TCP)Nil (5) are reported. Reaction of 3 and 5 with diphenylacetylene (7) yields alkyne complexes (R 3 P)NiI(PhC2Ph)Ni(R 3 P)I (R = Ph (8a), and Cy (8b)). In solution, 3 disproportionates to give nickel(O) and (TPP) 3 Ni 3 I 4 (12)), the structure of which has been determined by X-ray crystallogra-phy. Cluster compound 12 is cleaved into monomeric units by addition of ligands such as TPP or CO (TPP = triphenylphosphine, TCP = tricyclohexylphosphine, COD = 1,5-cyclooctadiene). | | |
Reference
| Z. Naturforsch. 40b, 607—614 (1985); eingegangen am 17. Januar 1985 | | |
Published
| 1985 | | |
Keywords
| Nickel(I), Alkyne Complex, Cluster, Crystal Structure | | |
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| default:Reihe_B/40/ZNB-1985-40b-0607.pdf | | | Identifier
| ZNB-1985-40b-0607 | | | Volume
| 40 | |
2 | Author
| Rainer Diercks, Heindirk Tom Dieck | Requires cookie* | | Title
| Diazadiene als Steuerliganden in der Homogenen Katalyse, VIII [1] Katalytische Trimerisierung substituierter Acetylencarbonsäureester und Isolierung eines Acetylendicarbonsäureester-Diazadien-Nickel(O)-Addukts Diazadienes as Controlling Ligands in Homogeneous Catalysis, VIII [1] Catalytic Trimerization of Substituted Acetylene Carbonic Acid Esters and Isolation of an Acetylene Dicarbonic Acid Ester Diazadiene Nickel(O) Adduct  | | | Abstract
| Nickel(O) complexes of diazadienes (dad = RN = CR — C R '=N R) catalyse the trimerization of esters of 2-butynoic acid, phenylpropynoic acid and butynedioic acid to give hexasubstituted benzenes with the unsymmetrical esters 2 as the main products. A primary adduct 7 of acetylene dicarboxylic acid dimethyl ester of the type (dad)Ni(alkyne) could be isolated and characterized by 'H NMR, IR and UV spectroscopy. According to their characteristic CT absorption. 7 and its analogues are shown to persist during catalysis as an active species. | | |
Reference
| Z. Naturforsch. 39b, 180 (1984); eingegangen am 24. August 1983 | | |
Published
| 1984 | | |
Keywords
| Catalytic Trimerization, Diazadiene Nickel Complexes, Alkynes, Hexasubstituted Benzenes, Alkyne Complexes | | |
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| default:Reihe_B/39/ZNB-1984-39b-0180.pdf | | | Identifier
| ZNB-1984-39b-0180 | | | Volume
| 39 | |
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