Transition metal-substituted paraffins: synthesis and properties of some μ-saturated heterobimetallic complexes containing Mo and W or Fe and the crystal structures of [(η5-C5H5)(CO)3W(CH2)3Mo(CO)2(PPh3)(η5-C5H5)] and [(η5-C5H5)(CO)2(PPh3)Mo(CH2)3Fe(CO)2(η5-C5H5)]

Reaction studies on some functionalized alkyl transition metal compounds and the crystal structure of [Cp(CO)3W{(CH2)3NO2}]

“…The 13 C NMR spectrum showed a shift of ca. 5 ppm observed for the CpMo (from 90.85 ppm in 11 [8] to 95.06 ppm), MoC(O)CH 2 70.86 ppm, FeCH 2 3.87 ppm (versus 9.60 in 11) and the central carbon of the alkyl chain at 33.88 ppm compared to 46.10 ppm [8]. The CpFe peak of the product shifted only slightly (by 0.16 ppm) relative to the starting material, and this further supports the conclusion that Mo was the site of attack.…”

“…The application of some of these compounds in organic synthesis has been described [1], but few reaction studies on these compounds have been reported. Importantly, compounds of the type [L y M{(CH 2 ) nX }] (L y M = transition metal and its associated ligands, n P 1, X = halogen) are known precursors of cyclic carbene complexes [1] as well as homo-and heterodinuclear alkanediyl compounds [1,7,8]. Heterobimetallic alkanediyl compounds are proposed to be good precursors or models for catalytic intermediates.…”

“…We have previously reported the synthesis of the halogenoalkyl compounds [Cp(CO) 3 W{(CH 2 ) n X}] (Cp = g 5 -C 5 H 5 ; n = 3-6; X = Br, I) and [Cp(CO) 2 (PPhMe 2 )-Mo{(CH 2 ) n X}] (n = 3,4) [6], and the heterobimetallic alkanediyl compounds [Cp(CO) 3 W{(CH 2 ) 3 }ML y ] {ML y = Mo(CO) 3 Cp, Mo(CO) 3 Cp * (Cp * = g 5 -C 5 (CH 3 ) 5 ), Mo-(CO) 2 (PMe 3 )Cp} [8] and [Cp(CO) 2 Fe(CH 2 ) 3 Ru(CO) 2 Cp] [12], and now report on reaction studies carried out on some of these compounds. The compound [Cp(CO) 3 W{(CH 2 ) 3 Br}] (1) was reacted with silver nitrate in acetonitrile at room temperature to give an orange product.…”

Synthesis, characterization and reactions of the transition metal halogenoalkyl carbocation complexes [Cp(CO)2M{η2-CH2CH(CH2)nX}]PF6 (n=1–8, 10, M=Fe; n=3, 4 M=Ru; X=Br, I)

“…Halide displacement from complexes of the type [Cp(CO) n M(CH 2 ) m X] is one method of synthesizing alkyl-bridged homo and heterobimetallic complexes [12]. It was therefore thought that the reaction of the salt Na[Cp(CO) 2 Fe] with [Cp(CO) 2-Fe{g 2 -CH 2 CH(CH 2 ) 6 I}]PF 6 may lead to the bimetallic cationic complex [Cp(CO) 2 Fe{g 2 -CH 2 CH(CH 2 ) 6 }Fe(CO) 2 Cp]PF 6 .…”

“…Similarly, transition metal g 1 -alkenyl complexes of the type [[Cp(CO) 2 Fe{g 1 -(alkenyl)}] undergo b-hydride abstraction to give cationic diene complexes in which the metal is bonded to only one of the double bonds [4]. We were surprised to note that the hydride abstraction reaction has not been studied for transition metal halogenoalkyl complexes, although they have been known [5][6][7][8] and used as precursors for certain bimetallic complexes for more than two decades [5,[9][10][11][12]. To our knowledge the only references to cationic transition metal complexes involving halogenated olefins in the literature appear to be the bromopropenyl complex [Cp(CO) 2 Fe{g 2 -(CH 2 @CHCH 2 Br}]PF 6 [13] and the bromocyclopentenyl complex [Cp(CO) 2 FeCH 2 CHCHBrCH 2 CH 2 ]PF 6 [14].…”