Complexes In CH2Cl2 Research Articles

T-BUTYLPEROXY COBALT(III) SCHIFF BASE COMPLEXES. PREPARATION AND PROPERTIES

Abstract Treatment of t-butyl hydroperoxide with cobalt(II) Schiff base complexes in CH2Cl2 at room temperature gave the corresponding t-butylperoxy cobalt(III) complexes, which were isolated as crystals in good yield. The peroxy complexes oxidize Ph3P to Ph3PO and the Co–O bond in the peroxy complexes undergoes heterolysis with acids but homolysis in alcohols.

Highly selective nitration agents obtained by complexation of nitronium tetrafluoroborate with crown ethers

A well behaved electrophilic aromatic substitution with very high substrate and positional selectivity is observed in benzene and toluene nitration with NO2BF4–crown ether complexes in CH2Cl2.

Activation of molecular hydrogen by cationic iridium diene complexes

The cationic complexes [Ir(cod)L2]PF6(1; L = tertiary phosphine; cod = cyclo-octadiene) react with dihydrogen at –80 °C in CD2Cl2 to give cis-[IrH2(cod)L2]PF6 complexes which revert to (1) on warming; at 0 °C in CH2Cl2 complex (1; L = PMePh2) is a highly active hydrogenation catalyst.

Reaktionen an Diborylamin-Palladiumkomplexen / Reactions on Diborylamine Palladium Complexes

Bis [bis (dimethylamino) boryl] dibromobenzyl - amine - palladium - bromide C6H5C (Br2) - N {B [N (CH3)2]2}2PdBr and the corresponding iodo complex react with phosphines like (C6H5)3P or (C6H5)2P-CH2-CH2-P(C6H5)2 in benzene solution under substitution of the diborylamine ligand. Substitution products are {[(CeH5) 3P]2PdBr}2, [(CeH5) 2P (CH2)2 P (C6H5) 2PdBr] 2 and [(C6H5)2P(CH2)2P(CeH5)2PdJ]2, diamagnetic crystalline compounds. On the contrary the dimeric C6H5C(J2) - N{B[N(CH3)2]2}2PdJ and P(CeH5)3 form a complex with the formula C6H5C(J2)-N{B[N(CH3)2]2}2PdJ[P(C6H5)3]2. Here the diborylamine seems to be co ordinated only by one BN2-group. The other BN2-group of the starting material is substituted by the first, the co ordinated iodine atom of the Pd-J-Pd-bridge by the second phosphine molecule. A solution of this phosphine complex in CH2Cl2 leads to yellow crystals of [(CeH5) 3PPdJ] n.