Amines and Related Ligands

2 Amines and Related Ligands - Ab initio calculations have been reported for the vibrational wavenumbers of Li2-NH3, Li-NHj, Li -NHj and Li2 -NH3. It was suggested that the vNH bands should be 2 orders of magnitude stronger than in free NH3.  

The IR spectra of [(NC)sM(dtdp)Ru(NH3)5], where M = Fe or Ru, dtdp = 4,4 -dithiopyridine, contain 5NH of the NH3 ligands near 1280 cm, consistent with a ruthenium(II) ammine. vCN values also show that M(II) was 

IR and Raman spectra were reported over a range of pressures for Cr(CO)4-(bipy) - the data enabled assignments to bipy ring modes to be placed on a firmer basis. The complexes [LCr i-(dmg)3M Cr L]°, where M = Li, n=l  

The picosecond transient resonance Raman spectrum of the oxomolyb-denum(V) porphrin system 5,10,15-tri-/7-tolyl-20-[2,3-[(hydrotris(3,5-dimethyl-pyrazolylborato) oxomolybdenio) - dioxy ] phenyl ] porphyrinato zinc (II) gave 

A band due to vC=0 is seen at 1698 cm in the IR spectrum of (45). TRIR studies on two isomeric Re(I)/Ru(II) complexes containing an unsymmetrical quaterpyridine bridging ligand gave evidence for the co-existence of two excited states. 

The IR spectra of gaseous clusters Fen(ND3), where n = 7-16, give a 5ND3 band in the range 880-890 cm DFT calculations gave vibrational wavenumbers for all of the ND3 modes7  

Ligand modes were assigned for Cd(NH3)2l2, using and D/H substitu- 

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Nickel(ii) Complexes.—Ammine, Amine, and Related Ligands. [Ni(NH3)g](l3)2 has been prepared by dissolving a nickel(ii) salt in aqueous ammonia and adding iodine and a five-fold excess of The reaction of hydrazine hydrate with... 

Sulfoxides, Amides, Amine Oxides and Related Ligands... 

Brief mentions of kinetics and mechanisms of reactions of nitrogen bases with a selection of palladium(II) complexes with ammine, amines, pyridine-2-carboxylate, pyridoxine, and related ligands are included in a review of analogous platinum(II) reactions (194). 

Abstract Several bismuth-catalyzed synthetic reactions, which proceed well in aqueous media, are discussed. Due to increasing demand of water as a solvent in organic synthesis, catalysts that can be used in aqueous media are becoming more and more important. Although bismuth Lewis acids are not very stable in water, it has been revealed that they can be stabilized by basic ligands. Chiral amine and related basic ligands combined with bismuth Lewis acids are particularly useful in asymmetric catalysis in aqueous media. On the other hand, bismuth hydroxide is stable and works as an efficient catalyst for carbon-carbon bond-forming reactions in water. 

A large amount of work has been devoted to N-binding macrocyclic complexes of Ni, Cu and Fe, which yield imine ligand products. Bidentate amine ligands, mainly ethylenediamine (en), have been used with Ru and Os complexes. The oxidation of coordinated ethylenediamine and related ligands stops at the diimine stage and does not continue to the dinitrile. The a,a -diimine entity -N=C-C = N- formed in the four-electron oxidation is particularly stable (93). 

Niobium and tantalum halides form adducts with various nitrogen donor ligands including aliphatic and aromatic amines nitriles, Schiffs bases and imidazoles (Table 5). The reactions of MXS with pyridine and related ligands such as bipy or phen depend critically on the reaction conditions. With py at low temperature MX5 (X = Cl, Br) yielded 1 1 adducts that are rapidly reduced to [MX4(py)2] on increasing the temperature, with formation of l-(4-pyridyl)pyridinium halide. Similarly, bipy and phen reduced the metal in MeCN to oxidation state +IV and formed monoadducts of type [MX bipy)] at room temperature, while at 0°C the same reactions yielded [NbCls(bipy)(MeCN)] and [TaX5(bipy)(MeCN)J (X = C1 or Br). NbBrs and Tals formed [MX5(bipy)2], which were formulated as the eight-coordinate [MX4(bipy)2]X.1 Reduction of the metal can however be prevented, even at room temperature,... 

Four-coordinate neutral complexes with anionic ligands derived from deprotonated amines, imines, oximes and related ligands... 

Complexes with organo-phosphorus and -arsenic oxides, amine oxides, amides, sulfoxides and related ligands... 

Complexes with Amines, Nitriles and Related Ligands 880... 

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