Complexes of Group

Sharma, A. Singh and R.C. Mehrotra, Indian J. Chem., Sect. A Inorg., Bio-inorg., Phys., Theor. Anal. Chem., 2000, 39A, 410. 

Woodman, M. Thornton-Pett and M. Bochmann, Chem. Commun., 2001, 329. 

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Preeminent in importance among the macro-cyclic complexes of Group 2 elements are the chlorophylls, which are modified porphyrin complexes of Mg. These compounds are vital to the process of photosynthesis in green plants (see Panel). Magnesium and Ca are also intimately... 

Recent advances in complexes of group VIB metals (Mo, W) with poly-(pyrazolyl)borate ligands 98MI2. 

Chang and coworkers [10] have synthesized amide derivatives of calixarenes and examined their ion binding properties with Group I and Group II cations. They observed that although the amides are much less effective than the esters for the complexation of Group I cations they are more effective for Group II cations. 

Thermochemistry of gaseous transition metal complexes of group V and VI ligands. P. M. Burken-shaw and C. T. Mortimer, Coord. Chem. Rev., 1983,48,101-155 (110). 

Fig 1 Heteroatom-stabilised (X=OR, NR2) and non-heteroatom-stabilised (X=alkyl, aryl) alkyl- (1), alkenyl- (2), aryl- (3) and alkynylcarbene (4) complexes of group 6 metals... 

Synthetic routes to mixed cyclopentadienyl/guanidinato complexes of Group 4 metals have also been developed. Scheme 78 illustrates two typical reactions leading to such compounds. 

Reaction of Carbonyl Hydrides with Complexes of Group-IB. 

S.3.2.2.2. Reaction of Carbonyl Hydrides with Complexes of Group-IB Metals. 

Wachter et al. reported the synthesis of polysulfido complexes of group 5 metals by the reaction of the corresponding trihydrides with elemental sulfur (Scheme 15). The reaction of Cp yNbHs with Ss gives the dinuclear poly-... 

Hidai et al. have reported the reaction of a diruthenium complex, (RuCp )2(yU-Si-Pr)2(//-S2), with zerovalent complexes of group 10 metals, [M(PPh3)4] (M=Pd, Pt) (Scheme 65) [146]. The reaction with the Pt complex... 

Over a decade on, this area is now beginning to reach maturity, with some of the early new developments subjected to intensive research and now consolidated. New areas have been opened up, for example, organometallic complexes of group. T... 

The proposed mechanism for the metallocene complexes of Group 5 metals and lanthanides involves the coordination of alkene to the metal hydride (51), followed... 

Hydride complexes of Group IV metallocenes have been implicated as catalysts and as important intermediates in olefin hydrogenahon and polymerization reactions [232, 233]. 

Boratabenzene complexes of Group 3 and Group 6 metals serve as effective catalysts for the oligomerization/polymerization of ethylene. For example, [(C5H5B-Ph)2ScPh]2, pretreated with H2, oligomerizes ethylene to furnish 1-alkenes.17a In the case of a Cr(III)-boratabenzene complex, ethylene is polymerized to afford... 

Transition metal carbyne complexes are still relatively uncommon as only a few synthetic approaches to these compounds has proved generally applicable. In addition to making the initial characterization (723), the Fischer group has made the largest contribution to carbyne complex chemistry, with some 200 mononuclear complexes of Group 6 and 7 metals having been prepared. 

Without question the vast majority of group 4B metal carbonyl complexes contain a metallocene framework. Only two carbonyl complexes of group 4B have been reported that contain 77-bondcd acyclic hydrocarbon ligands that are not metallocenes. 

Because of their decomposition in aqueous media (Table 1), complexes of group 1 metals have not been developed for PDT applications. 

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