Complex halides reactions with

These compounds generally exist in carbonyl forms. The oxygen function can be converted into halogen by phosphorus halides. Reactions with electrophiles are quite complex. Thus urazole (511) reacts with diazomethane quickly to yield (512), which is more slowly converted into (513). 1-Phenylurazole gives (514) however, 4-phenylurazole yields (515). Oxadiazolinones of type (516) can be alkylated at both O- and N-atoms. 

Aryl chlorothioformates, 23 628 Aryl complexes, zirconium, 26 655 Aryl ethers, uses for, 70 581 2-Arylglycine esters, 72 166 Aryl halide amination, 9 278 Aryl halides, reaction with carbon monoxide, 5 11 Arylhydrazines, 9 270 Arylmethane dyes, 9 503... 

The elements iron, cobalt and nickel, and the elements preceding the platinum-iron group, have not as strong a tendency to form covalent complexes in reaction with halides. There are no compounds K2NiGl6 or K4FeCl6. 

T-Alkyl- and Aryl-Metal Complexes by Reaction with the Corresponding Metal Halides... 

Passing from dimers to trimers and to clusters of higher nuclearity CO effects analogous and even more complex transformations. Reactions with cluster preservation are exemplified by the formation of Os4(CO),g from Os4(CO)i, at 0°C in CH2CI2 The cluster OsjPt (/<-H)4(CO)ioPChx3 adds CO to form the CO,i-(/t-H)2 cluster reversibly " . A similar behavior was observed for Os(CO)io(/<-H)2. Coordinatively flexible ligands such as NO, thiols and halides can also be used to introduce CO . Reversible CO addition to clusters [Mj( <3-CO)( i-dppm)3] (M = Pd, Pt) has been observed . 

In method (b). (1) is again formed the ligand iriphenylphosphine then promotes migratory insertion to give the anionic iron acyl complex (4). Reaction with another alkyl halide gives a complex (5) corresponding to (3) above. 

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