Manganese complexes carbon ligands

Manganese(IV) complexes, 102-109 alkyls, 103 bipyridyl, 103 bipyridyl oxides, 106 carbon ligands, 102 catechol, 106 chlorides, 108 cyanides, 83,102 dialkyidithiocarbamates, 106 dithiolates, 106 dithiolenes, 107 fluorides, 107 halides, 107 hydroxides, 104 iodates, 105... 

High epoxidation activity was found for manganese complexes based on dinucleating ligand N,N,N, N"-tetrakis(2-pyridylmethyl)-l,3-propanediamine (tptn) [132]. The ligand contains a three-carbon spacer between the three-N-donor sets. This type of ligand is readily accessible, and facile modification of the ligand structure can be achieved. Complexes of this type have also been reported as mimics for PSII [131]. 

Alkyl- and aryl-cobalt tetracarbonyls also react readily with phosphines forming acyl derivatives RCOCo(CO)3PR 3. Phosphite ligands are found to replace carbon monoxides successively forming RCOCo(CO)2L2 [193]. The replacement of two carbon monoxide ligands by phosphites under conditions where phosphine ligands will only replace one carbon monoxide, is therefore found for both cobalt and manganese complexes. Both... 

The first metal-olefin complex was reported in 1827 by Zeise, but, until a few years ago, only palladium(II), platinum(Il), copper(I), silver(I), and mercury(II) were known to form such complexes (67, 188) and the nature of the bonding was not satisfactorily explained until 1951. However, recent work has shown that complexes of unsaturated hydrocarbons with metals of the vanadium, chromium, manganese, iron, and cobalt subgroups can be prepared when the metals are stabilized in a low-valent state by ligands such as carbon monoxide and the cyclopentadienyl anion. The wide variety of hydrocarbons which form complexes includes olefins, conjugated and nonconjugated polyolefins, cyclic polyolefins, and acetylenes. 

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