Nickelkomplexe mit Px-Liganden

Metal-vapour synthesis of phospha-organometallic compounds: reaction of nickel atoms with the phospha-alkyne tBuCP. Structural characterisation of [Ni(η3-PC2tBu2)(η5-P3C2tBu2)], a derivative of the novel, aromatic phosphirenyl cation

“…The [AB 2 ] portion may be attributed to the phosphorus atoms of the 1,2,4-triphosphacyclopentadienyl ring and the [X] part to the phosphorus atom of the phosphirenyl cation. Of particular note is the chemical shift of the P X (-161.2 ppm), which lies very close to the reported value of d = -161.3 ppm for the structurally related compound [Ni(g 3 -P 3 )(g-C 5 H 3 t Bu 2 )] previously described by Scherer et al [11].…”

“…The lack of change in nickel-ring centroid distance is offset by fluctuations in Ni-C distances for the compounds studied, and is contrary to results obtained for [V(g 5 -C 5 H 5 )(g 7 -C 7 H 7 )] [28] for which V-C distances lie in the narrow range 2.23-2.25 Å. Table 1 lists comparative data for 3 with those for [Ni(g 3 -C 3 Ph 3 )(g 5 -C 5 H 5 )] 27 and the related triphosphenium complex [Ni(g 3 -P 3 )(g-C 5 H 3 t Bu 2 )] [11]. The variation in metal-to-ring-centroid and metal-to-ring atom distances is not large, the most significant differences in bond lengths occurring between the P 3 ring cation in [Ni(g 3 -P 3 )(g 5 -C 5 H 3 t Bu 2 )] and the phosphirenyl cation-metal bond lengths in 3.…”

A General Pathway to Heterobimetallic Triple‐Decker Complexes

“…The Cp'''l igands are tilted by 188 to each other.C ompared to the PÀPb ond lengths in E [8] (average:2 .098(2) ), the P1ÀP2 (2.1895(6) )a nd P2ÀP3 (2.1945 (6) )b ond lengths in 3 are elongated upon coordination to another metal fragment and lie in the range of PÀPs ingle bonds. The Cp'''l igands are tilted by 188 to each other.C ompared to the PÀPb ond lengths in E [8] (average:2 .098(2) ), the P1ÀP2 (2.1895(6) )a nd P2ÀP3 (2.1945 (6) )b ond lengths in 3 are elongated upon coordination to another metal fragment and lie in the range of PÀPs ingle bonds.…”

“…M = Cr, [1] Mo, [2,3] W, [4] Fe, [5,6] Co, [7] Ni, [8] Cp = cyclopentadienyl) or photolysis of [Cp R M(CO) 4 ]( e.g. Most reactions proceed by thermolysis of carbonyl complexes such as [(Cp R M(CO) n ) 2 ]( e.g.…”

Der cyclo‐P4‐Sandwichkomplex des Cobalts und seine Rolle bei der Bildung von Polyphosphorverbindungen

“…P 4 )] (Typ I:M = V, [8] Nb, [9] Ta, [10] Cp R = C 5 Me 5 ,C 5 H 3 tBu 2 ) bekannt sind, die durch Cophotolyse von P 4 mit Metallcarbonylkomplexen (Schema 1) synthetisiert wurden. Eisencyclo-P 5 -Sandwichkomplexe [Cp R Fe(h 5 -P 5 )] (Typ III:C p R = C 5 Me 5 , [11] C 5 Me 4 Et, [12] C 5 H 2 tBu 3 , [13] C 5 (CH 2 Ph) 5 [14] )u nd Nickel-cyclo-P 3 -Sandwichkomplexe [Cp R Ni(h 3 -P 3 )] (Typ V: Cp R = C 5 Me 5 , [15] C 5 H 3 tBu 2 , [16] C 5 H 2 tBu 3 [17] )k çnnen leicht durch die Cothermolyse von P 4 mit Metallcarbonylkomplexen erzeugt werden. Sie sind thermisch stabile Verbindungen und kçnnen sogar an der Luft gehandhabt werden, ohne dass sie sich zersetzen.…”