Dilithium 2- chloride

Calcium phthalocyanine (PcCa) can be prepared by the reaction of calcium oxide with phthalonitrile58 or by the reaction of dilithium phthalocyanine and calcium chloride in ethanol.59... 

Arsenic phthalocyanine (PcAsCl) can be prepared by metal exchange starting from dilithium phthalocyanine and arsenic(lll) chloride in dimethylformamide.163... 

Dichloro-l-lluorovinyl)ferrocene, 3470 Dicumenechromium(O), 3767 Dicyclopentadienylchromium, 3273 4,4-Diferrocenylpentanoyl chloride, 3859 Dilithium //-cyclooctatctracnc. 2948 Dimethylaminomethylferrocene, 3613 2-(Dimethylaminomethyl)lluoroferrocene, 3612 Dipotassium //-cyclooctatctracnc. 2947 Ferrocene, 3276... 

Diphenyl telluropyran-4-one (typicalprocedure)7° 120 mL (0.12 mol) of a 1.0 M solution of lithium triethylborohydride in tetrahydrofuran are added to 7.65 g (60 mmol) of powdered tellurium under nitrogen, and the mixture stirred at 20°C for 4 h. A solution of sodium ethoxide (prepared from 5.52 g (0.24 mol) of sodium and 240 mL of absolute alcohol) is added to the dilithium telluride, 13.8 g (60 mmol) of bis(phenylethynyl) ketone are dissolved in a mixture of 150 mL of tetrahydrofuran and 150 mL of 1 M sodium ethoxide in ethanol this solution is poured as quickly as possible into the deep-purple-coloured dilithium telluride soluhon. The flask containing the reaction mixture is immediately placed in a water bath at 50°C and the temperature slowly increased over 30 min until ethanol begins to condense on the side of the flask. The water bath is removed and the mixture is stirred overnight at 20°C. Dichloromethane (400 mL) is then added, the resultant mixture is washed with 800 mL of water, and the organic phase is separated and concentrated to an oil. The oil is dissolved in 600 mL of dichloromethane, and the solution is filtered through a pad of sand. The filtrate is washed with 200 mL of 2% aqueous sodium chloride soluhon, dried with anhydrous sodium sulphate, filtered and evaporated. The brownish solid residue is triturated with 20 mL of butanenitrile and the fine yellow solid is collected by filtration yield 10.9 g (51%) m.p. 126-129°C (from acetonitrile). 

Another type of adducts [8, Eq. (3)] was formed by the reaction of di(fert-butyl)aluminum chloride with dilithium bis(trimethylsilyl)hydrazide in low yields below 30% [19]. The structure of 8 consists of a distorted heterocubane with four vertices occupied by nitrogen atoms, two of which are connected by an intact N—N bond across one face of the cube. The cation positions are occupied by two aluminum and two lithium atoms, of which the last ones bridge the N—bond. Part of the hydrazide molecules was cleaved, and the aluminum atoms are bonded to one ferf-butyl group only. On the basis of the NMR spectroscopic characterization many unknown by-products were formed in the course of that reaction, and no information is available concerning the reaction mechanism. Compound 8 may be described as an adduct of dilithium bis(trimethylsilyl)hydrazide to a dimeric iminoalane containing a four-membered AI2N2 heterocycle. Further... 

The Se-(4-methoxybenzyl)selenocysteine is obtained by reduction of selenocystine with NaBH4 and in situ reaction with 4-methoxybenzyl chloride. 7 The optimized procedure of Tanaka and Soda 32 is preferentially used for the synthesis of the starting selenocystine, which involves reaction of (1-chloroalanine with a 2.3-fold excess of disodium diselenide in aqueous solution at pH 9. Alternatively, the significantly less selenium demanding synthesis of Stocking et al. 33 is used for the preparation of expensive 77Se-selenocystine, this consists of the reaction of methyl (2R)-2-[(/ert-butoxycarbonyl)amino]-3-iodopropanoate with equivalent amounts of dilithium diselenide. Subsequent conversion of SeC(Mob) into the M -Fmoc derivative 7 and finally into the pentafluorophenyl ester 10 is performed following standard procedures. 

Related to these reactions is that of Cr(CO)6 with a dilithium alkynolate (28) the intermediate acyl dianion loses CO on irradiation to give 10, which reacts with acetyl chloride in the presence of PPh3 to give a low yield of 11 ... 

Less reactive silyl metal species such as lithium bis(triphenylsilyl) cuprate react with a variety of acyl chlorides to give the corresponding acyl silanes in moderate to good yields75. Dilithium bis(trimethylsilyl) cyanocuprate is particularly effective for the preparation of sterically hindered acyl silanes (Scheme 8), and appears to provide a good general... 

Silicon-bridged [l,l]metallocenophanes of type 40 in Scheme 14 represent another class of dinuclear compounds with the ligand system (30). The synthesis of the 1,1,12,12-tetramethyl [1,1] silaferrocenophane was reported by two groups only recently. In one procedure, the dilithium salt of dicyclopentadienyldimethylsilane was reacted with ferrous chloride to give a mixture of the metallocenophane with poly(ferrocenyldimethylsilane) (equation 55)124. In the other procedure, this compound was prepared in a multistep synthesis starting from dilithio ferrocene, as shown in equation 56125... 

Diferrocenylpentanoyl chloride, 3853 Dilithium p-cyclooctatetraene, 2943 Dimethylaminomethylferrocene, 3607 2-(Dimethylaminomethyl)fluoroferrocene, 3606 Dipotassium p-cyclooctatetraene, 2942 Ferrocene, 3270... 

Chloromagnesium chloride Sodium hydride Dilithium tetrachlorocuprate(II) 2,6-Dichlorobenzenethiol... 

The chlorine atom in r/-butyl-2-chloronicotinatc can be displaced with a diselenide group in moderate yield using dilithium diselenide in THF <2003SC3805>. The resulting diselenide is hydrolyzed and cleaved to the chlorose-lenide on treatment with thionyl chloride and catalytic amounts of DMF (Scheme 29). 

Phosphor(V)-chlorid reagiert mit o-Diphenolen in Gegenwart von Triethylamin9 bzw. mit Dilithium-1,2-benzoldiolat10 11 oder mit Benzhydroxamsauren12 zu den entsprechenden Phosphoranat-Komplexen ... 

Bis-[2,2 -biphenyldiyl]-phosphonium-[tris-(2,2 -biphenyldiyl)-phosphat] ist ausgehend von Phosphor(III)-chlorid mit 2,2 -Dilithium-biphenyl bei 20° bequem zuganglich1 ... 

A similar reaction with vinylacetylene in the absence of tin(II) chloride in a medium consisting of aqueous potassium hydroxide and DMSO gave bis[l,3-butadienyl] tellurium in 3% yield as a mixture of isomers with the cis-cis isomer as the predominant species3. The reaction of dilithium telluride with l,5-diphenyl-l,4-pentadiyn-3-one led to the formation of 2,6-diphenyl-4-oxo-4H-tellurin as the major product and of bis[1,5-diphenyl-3-oxo-5-ethoxypenta-l,4-dien-]-yl tellurium as a by-product5. 

Continuing their work on 1,4-dianions of phenylhydrazone, Hauser and coworkers inspected similar reactions with the 1,4-oxime dianions98. Acetophenone oxime gave the dilithium salt in reaction with /-BuLi and underwent C-alkylation with benzyl chloride and dialkylation with 1,4-dibromobutane (equation 32). 

Reaction of allylnickel chloride with dilithium pentalenide in tetrahydrofuran solution at —20 °C and below yields a stable, deep green, monomeric complex, 258) X-ray crystal structure analysis of which shows the molecule to possess a center of symmetry and to have the nickel atoms trans to each other as in 183,259 ... 

Reaction of the Dilithium Salt of the Porphyrin with Ferrous Chlorid ... 

Although while U(Cp- )2Cl2 does not appear to be isolable because of unfavorable ligand redistribution equilibria , reaction of UCI4 with the dilithium salt of dicyclopentadienylmethane produces the dimeric lithium chloride adduct , U2[CH2(f/ -C5H4)2]2Cl5 [Li(THF)2], which in turn reacts with bipy or phen ... 

Treating the dilithium salt of o-hydroxybenzeneselenol, generated in situ from 2-bromophenol 253, with (dichloro-methylene)dimethylimmonium chloride (Viehe s salt), followed by sodium hydrogenselenide gave benzo-l,3-oxa-selenole-2-selone 153 (Scheme 13) <2004JOC9319>. 

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