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1993 (1)
1987 (1)
1Author    KlausR. Pörschke, Richard MynottRequires cookie*
 Title    Bis(dimethyIphosphino)methan-Nickel(0)-Komplexe Bis(dimethylphosphino)methane-Nickel(0) Complexes  
 Abstract    The reaction of tris(ethene)nickel(0) with stoichiometric amounts of bis(dimethylphos-phino)methane (dmpm) in ether at low temperature affords the yellow crystalline, dinuclear complexes (dmpm)Ni 2 (QH 4) 4 (1) and (dmpm)2Ni 2 (C 2 H 4)2 (2). 2 reacts with ethyne to yield (dmpm) 2 Ni 2 (C 2 H 2) 2 (3). When 2 is treated with CO at —40 °C the primary product is (dmpm) 2 Ni 2 (CÖ) 2 (w-CO) (4). At 20 °C 4 is converted by additional CO into (dmpm) 2 Ni 2 (CO) 4 (5), which has already been characterized as the reaction product of Ni(CO) 4 with dmpm. In compounds 1—5 the bidentate dmpm acts as a bridging and not as a chelating ligand. The structures of complexes 1—4 were assigned on the basis of their 13 C and 31 P NMR spectra. 
  Reference    Z. Naturforsch. 42b, 421—424 (1987); eingegangen am 9. August 1986 
  Published    1987 
  Keywords    Carbonyl, Ethyne, Nickel(O), Phosphane, 13 C NMR Spectra 
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 TEI-XML for    default:Reihe_B/42/ZNB-1987-42b-0421.pdf 
 Identifier    ZNB-1987-42b-0421 
 Volume    42 
2Author    H. Einrich, Uwe Lay, M. Ichael Leise, Laszlo ZsolnaiRequires cookie*
 Title    Propargyl-, Allenyl-und Alkinyl  
 Abstract    A norganisch-C hem isches In stitut der U niversität, Im N euenheim er Feld 270, D-W -6900 H eidelberg 1 Z. N atu rfo rsch . 48b, 2 7 -3 6 (1993); eingegangen am 23. M ärz 1992 P ropargyl, Allenyl and Alkynyl P hosphanes, C o o rd in atio n A bility, Isom erization, C rystal S tructure T he synthesis and reactivity o f non-co o rd in ated an d c o o rd in ated pro p arg y l pho sp h an es are discussed. T he isom erization o f the propargyl unit in (R)P(C 1)(C H 2C = C H) (3) (R = 2,4,6-'B u3C 6H 20) in the presence o f N E t3 yields the^ allenyl su b stitu ted p ro d u ct (R)P(C1)(CH = C = C H 2) (4). H ow ever, in the presence o f H N E t2 the dim ethylenecyclobutane 7 is form ed. D ifferent synthetic pathw ays for the p rep aratio n o f L "M P(Ph)m(C H 2C = C H)3 m com plexes (m = 2: L"M = (//5-C 5H 5)(C O)2M n: 10a; L"M = (C O)5Cr: 10 b; m = 1: L"M = (^5-C 5H 5)(C O)2M n: 13a; L"M = (?/5-C 5H 4M e)(C O)2M n: 13b) are described. T he synthesis o f the alkynyl substituted phosp h an e com pounds L"M P(Ph)m(C = C R)3 m (m = 2: R = Ph, LnM = (/;5-C 5H 5)(C O)2M n: 20a; L"M = (C O)5Cr: 20b; R = "Bu, L"M = (C O)5Cr: 20c; m = 1: R = Ph, L"M = (/75-C 5H 5)(C O)2M n: 22) was also possible. The reaction o f (>/5-C 5H 4M e)(C O),M n P P h (C H ,C = C H)2 (13 b) w ith C o 2(C O)8 affords in high yields (V5-C 5H 4M e)(C O)2M nPPh[(?/2-C H 2C = C H)C o 2(C O)6]2 (15). All new co m pounds have been characterized by analytical a n d spectroscopic d a ta (IR , 'H -, 13C { 'H } -, 31P { 'H } -N M R , M S) an d (;/5-C 5H 5)(C O)2M n P (P h)(C H 2C = C H)2 (13a) by X -ray analysis. 
  Reference    (Z. Naturforsch. 48b, 27 [1993]) 
  Published    1993 
  Keywords    Phosphane, Synthese, Reaktivität, Isomerisierung* Propargyl-, Allenyl-and A lkynyl-Phosphanes, Synthesis, R eactivity, Isom erization 
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 TEI-XML for    default:Reihe_B/48/ZNB-1993-48b-0027.pdf 
 Identifier    ZNB-1993-48b-0027 
 Volume    48