Use of the MnCC system in organometallic and organic synthesis

Chemistry of vinylidene complexes. XVIII. Synthesis and molecular structure of the novel trinuclear μ3-vinylidene complex CpReFePt(μ3-CCHPh)(CO)6(PPh3)

“…The C(1)@C(2) bond length of 1.412(4) Å in 2 is comparable with that in the known l 3 -vinylidene complexes (1.25-1.43 Å) [4]. The l 3 -C 1 @C 2 HPh ligand in complex 2 is bound to the Fe atom asymmetrically, since the Dd difference between the Fe-C(2) and Fe-C(1) distances is 0.231 Å and the Fe-C(1)-C(2) and Fe-C(2)-C(1) angles are 79.3(2)°and 61.6(2)°, respectively.…”

“…Significant asymmetry of p-bonding of the M atom with the l 3 -C 1 @C 2 HR ligand is a characteristic feature of the well known l 3 -vinylidene clusters with triangular metal cores, where the Dd difference between the M-C 2 and M-C 1 bond lengths averages 0.25 Å [4]. Similarly, the l 3 -C(1 0 ) = C(2 0 )HPh ligand in 3 is g 2 -coordinated to the Pd(1) atom asymmetrically, since the Dd difference between the Pd(1)-C(2 0 ) and Pd(1)-C(1 0 ) distances is equal to 0.227 Å; the angles are Pd (1)…”

“…Heterometallic l 3 -vinylidene clusters with the MM 0 M 00 cores belong to the rarest type of vinylidene complexes [2][3][4]. l 3 -Vinylidene clusters with the RuCo 2 and MCoM 0 cores (M = Fe, Ru; M 0 = Mo, W, Fe, Ni) were prepared earlier by rearrangement of l 3 -alkyne isomers or by an exchange of the Co atom in the l 3 -vinylidene FeCo 2 or RuCo 2 clusters for the M 0 = Mo, W, Fe, Ni atom [5].…”

“…We have described an original approach to the synthesis of the trimetallic MM 0 M 00 l 3 -vinylidene clusters by consecutive assembly of a metal core from mononuclear (M) and dinuclear (MM 0 ) vinylidene building blocks in mild conditions [2,4,6]. The first l 3 -vinylidene MnFePt clusters were prepared by consecutive transformations of Cp(CO) 2 Mn@C@CHPh into Cp(CO) 2 MnPt(lC@CHPh)(L) 2 (L = PPh 3 , P(OR) 3 ; (L) 2 = dppm) and the latter into CpMnFePt(l 3 -C@CHPh)(L) n (CO) m (n = 1 and 2; m = 5 and 6) at 20°C [6,7].…”

Phenylvinylidene Clusters Containing ReFePt Metal Cores and Chelate Diphosphine Ligands at the Platinum Atom

“…Ранее на основе реакций биядерных комплексов Cp(CO) 6 (L), содержа-щих только терминальные фосфорсодержащие и карбонильные лиганды при атоме платины [25,26]. Однако реакции биядерных винилиденовых MnPt комплексов, содержащих хелатные дифосфиновые лиганды с нонакарбонилом дижелеза приводили к отщеплению циклопентади-енилатрикарбонил марганца и образованию продуктов переметаллирования исходных соеди-нений (рис.…”