Several methods for the synthesis of tricarbonyl(η6-quinaldine)chromium 4 were investigated. Whereas thermal and photochemical complexation gave exclusively pentacarbonyl(η1-quinaldine)chromium 2, thermal and high pressure ligand exchange reactions employing (CH3CN)3Cr(CO)3 and tricarbonyl(η6...

This paper presents a theoretical analysis of the structures of tricarbonyl chromium complexes of carbo- and heterocyclic polyaromatic ligands (PAL) and the mechanisms of interring haptotropic rearrangement in such complexes performed by using density functional theory (DFT) with the nonempirica...

Reaction of fluoranthene with Cr(CO)3Py3/BF3·OEt2 at 25 °C affords a mixture of two isomeric complexes: traces of tricarbonyl(1-5,15-η6-fluoranthene)chromium (3) (coordination to benzene) and, as the major product, tricarbonyl(1-4,15,16-η6-fluoranthene)chromium (2) (coordination to naphthale...

The crown ethers dibenzo-16-crown-4 and dibenzo-18-crown-5 and a diaryl polyether were complexed by the chromium tricarbonyl group for the purpose of selective functionalization. This complexation did indeed permit exclusive functionalization of the complexed ring. CHO and CH2OH functionalities ...

A general method for the regioselective benzylic metallation of (η6-alkylarene)chromium tricarbonyl complexes on the action of lithium amides in THF under very mild conditions has been developed. Transmetallation reactions of the lithium derivatives thus obtained produce the corresponding benzy...

Pure enantiomers of chromium tricarbonyl complexes of α- and β-monosubstuted naphthalenes RC10H7Cr(CO)3 (R=Cl, Me, SiMe3, SnMe3) were separated as pure enantiomers by chiral phase HPLC on a Chiracel OD column. Inter-ring haptotropic rearrangements (IRHRs) (process in which metal shifts betwe...

Methylene interrupted dienes react with (naphthalene)(tricarbonyl)chromium under H2 to yield a mixture of positionally isomeric cis-monoene products. The isomer distribution, reactions with proposed organic intermediates, and kinetic studies suggest a mechanistic pathway that includes (1) loss o...

The synthesis of tricarbonyl(N-methylisatin)chromium(0) (6) was achieved by protection of the keto functionality of the ligand as an acetal followed by complexation with tricarbonyl(naphthalene)chromium(0) and subsequent deprotection with formic acid. In order to obtain a removable substituent a...

A new penta-carbonyl chromium(0) complex of the type [Cr(CO)5(L)] (L = tetracyclic pyrrolobenzazepine unit 3) was surprisingly obtained by reacting [Cr(CO)3(naphthalene)] or [Cr(CO)3(tmtach)] with the tetracyclic pyrrolobenzazepine unit 3 in octane-ether/THF-solvent mixtures or acetone under amb...

The synthesis of organometal complexes from chromium hexacarbonyl with 1-methyl-naphthalene ligand is reported. Two arene-chromium-tricarbonyl isomers are formed at competitive yields, featured with the metal fragment coordinated to both the methylated and the benzenic aromatic ring. A single-cr...

The organometallic Lewis acid (η-cyclopentadienyl)zirconium trichloride (2) was obtained from bis(cyclopentadienyl)zirconium dichloride (1) and chlorine by means of a radical induced metal-Cp bond cleavage. Reaction of 2 with tetrahydrofuran gave the CpZrCl3-bis(tetrahydrofuran) adduct 3; treat...

The reactivity pattern of the 16-electron species [M(Cp)2Cl2] (M = Zr, Hf; Cp− = η5-C5H5−) and [Ti(MeCp)2Cl2] (MeCp− = η5-C5H4CH3−) towards the dipicolinate(−2) (dipic2−) ligand under mild (ambient temperature) and convenient (aerobic reactions, aqueous media) conditions have been investigated...

Zirconium(IV) N,N-dialkyl dithiocarbamates of the type MeCnZr(S2CNR2)3 where R = Me, Et have been prepared by reaction of bis-methycyclopentadienyl zirconium(IV) dichloride with sodium salts of substituted dithiocarbamic acids in aqueous and non-aqueous media. They have also been prepared by rea...

Irradition of benzene solutions of zirconocene dichloride and zirconocene- d10 dichloride with 313 nm light leads to the formation of zirconocene-d5 dichloride with a quantum yield of 0.021 mol/Ei. The equilibrium constant is 2.8 Zirconocene dichloride exchanges a cyclopentadienyl ligand photoly...

Low pressure chemical vapour deposition (LPCVD) of [ZrCp2(NMe2)2] (1), [ZrCp2(η2-MeNCH2CH2NMe)] (2), [ZrCp′2(NMe2)2] (3) and [ZrCp′2(NEt2)2] (4) (Cp = η5-cyclopentadienyl, Cp′ = η5-monomethylcyclopentadienyl), onto glass substrates at 600 °C, afforded highly reflective and adhesive films ...

Seventeen bis-carboxylate derivatives of bis(methylcyclopentadienyl)titanium have been prepared by the reaction of bis(methylcyclopentadienyl)titanium dichloride with the appropriate sodium salts of substituted benzoates. They have been characterized by elemental analysis, IR and 1H NMR. When tr...

Zirconium(IV) N,N-dialkyldithiocarbamates of the type Cp2Zr(S2CNR2)Cl and (MeCp)2Zr(S2CNR2)Cl (R = Me, Et) have been prepared by reaction of dicyclopentadienyl zirconium(IV) dichloride and bismethylcyclopenadienyl zirconium(IV) dichloride with anhydrous sodium N,N-dialkyldithiocarbamates in refl...

An air-stable uninuclear complex of bis(isopropylcyclopentadienyl) zirconium perfluorooctane sulfonate (1a·H2O·3THF) was successfully synthesized by the reaction of (i-PrCp)2ZrCl2 with C17SO3Ag. The compound 1a·H2O·3THF was characterized by different techniques (such as X-ray single crystal ...

Air-stable binuclear complex of bis(methylcyclopentadienyl)zirconium perfluorooctanesulfonate (1a) was successfully synthesized by the reaction of (CH3Cp)2ZrCl2 with C8F17SO3Ag. The compound 1a was characterized by different techniques and found to have the nature of air-stability, water toleran...

Far-infrared spectra of 1,3-butadieneiron tricarbonyl, C4H6Fe(CO)3, cyclopentadienyl-manganese tricarbonyl, C5HMn(CO)3 and methylcyclopentadienylmanganese tricarbonyl, CH3C5H4Mn(CO)3 in the vapour phase have been reported first time in the region 500-10 cm−1. An assignment of the frequencies on ...