Complexes isolation

Zeise s salt, K[PtCl3(C2H4)]. A ff-elhylene complex, the first such complex isolated. 

Phosphorus Donors. Phosphine coordination complexes of thorium are rare because the hard Th(IV) cation favors harder ligand donor types. The only stable thorium—phosphine coordination complexes isolated as of the mid-1990s contain the chelating ligand,... 

Syntheses, crystallization, structural identification, and chemical characterization of high nuclearity clusters can be exceedingly difficult. Usually, several different clusters are formed in any given synthetic procedure, and each compound must be extracted and identified. The problem may be compounded by the instabiUty of a particular molecule. In 1962 the stmcture of the first high nuclearity carbide complex formulated as Fe (CO) C [11087-47-1] was characterized (40,41) see stmcture (12). This complex was originally prepared in an extremely low yield of 0.5%. This molecule was the first carbide complex isolated and became the foremnner of a whole family of carbide complexes of square pyramidal stmcture and a total of 74-valence electrons (see also Carbides, survey). 

First thionitrosyl (NS) complex isolated by J. Chatt and J. R. Dilwonh. 

Other halides can be introduced by metathesis. Figure 2.55 summarizes some of the complexes isolable with dimethylphenylphosphine, similar in general to the corresponding iridium complexes (section 2.13.3), including the photochemical isomerization of the mer-isomer. 

Table 3.8 M(PR3) complexes isolated in the solid state (S) and detected in solution (/)...

Davis MM, Chien YH, Gascoigne NR et al (1984) A murine T cell receptor gene complex isolation, structure and rearrangement. Immunol. Rev 81 235-258... 

As was suggested in the preceding discussion, most of the arene complexes isolated by metal-atom techniques are benzene derivatives. However, heterocyclic ligands are also known to act as 5- or 6-electron donors in transition-metal 7r-complexes (79), and it has proved possible to isolate heterocyclic complexes via the metal-atom route. Bis(2,6-di-methylpyridine)Cr(O) was prepared by cocondensation of Cr atoms with the ligand at 77 K (79). The red-brown product was isolated in only 2% yield the stoichiometry was confirmed by mass spectrometry, and the structure determined by X-ray crystal-structure analysis, which supported a sandwich formulation. 

As was the case for the Ni (123) and Pd/C2H4 (140) systems, each of the binary olefin complexes isolated has associated with it a moderately intense, UV band, the bands for Pd complexes lying at higher energy than those of the nickel complexes in addition, for each olefin sys-... 

SCHEME 2.12 o-QM metal complexes isolated and characterized by X-ray diffraction, which structures have been used as a validation for DFT calculations. 

Cobalt(III) complexes of formula cis- and trans-[Co(dtc)L4]2+ and [Co(dtc)2L2]+ where dtc = dimethyl-, diethyl- or piperidino-dithiocarbamate were prepared with phosphites P(OMe)3, P(OEt)3 and 4-ethyl-2,6,7-trioxa-l-phophabicyclo[2.2.2]octane as ligands L.1048 Whereas Co—P bonding is found, as defined in the crystal structures of each of the two forms of complexes isolated, a linkage isomer in which the phosphite is O bound was detected for the bis(dithio-carbamate) compounds. 

The green polymeric complex isolated directly from the reaction mixture explodes fairly violently at elevated temperatures. The tetrahydrate produced by recrystallisation from aqueous methanol is also moderately explosive when heated rapidly. 

Shibata, N., Kobayashi, H., Tojo, M. and Suzuki, S. (1986) Characterization of phosphomannan-protein complexes isolated from viable cells of yeast and mycelial forms of Candida albicans NIH B-792 strain by the action of Zymolyase-IOOT. Archives of Biochemistry and Biophysics, 251 (2), 697-708. 

Large-scale Ni2+ affinity and gel filtration chromatography (complex isolation)... 

Thiols like pyridine-2-thiol yield (carbene)gold thiolates, and onium salts give cationic (carbene)gold ylide complexes, isolated and characterized as the perchlorates.170 The reaction of dithiocatechol with (cyclohexylisocya-nide)gold chloride affords a carbene complex [(CyNC)AuC(NHCy)2]+Cl-, which co-crystallizes with a neutral tetranuclear complex [(CyNCAu)2Au2(S2C6H4)2].224... 

With the a-CD-PEG complexes isolated by filtration or centrifugation, the yields of complexes were determined as a function of PEG molecular weight, assuming that two ethylene glycol units are bound to one a-CD, i.e., the stoichiometric ratio is 2 1, and the results shown in Fig. 3 were obtained. It is... 

Mills et al. [20] carried out reversed-phase liquid chromatographic studies of dissolved organic matter and copper-organic complexes isolated from estuarine waters. 

Solution Spectra. Additional insight into the ruthenium species involved in acid homologation comes from studies of the solution spectra by FTIR and the metallic complexes isolated from the final product mixtures. 

Table 1 compares the specific activities of PS1 and PS2, respectively, in comparison with PS1- and PS2 complexes isolated from WT. These data show, that the activities of His-tagged complexes are only slightly lower than the respective WT complexes, i.e. the His-tag in these complexes apparently does not interfer with the activity under these conditions. 

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