Iron complexes silver adducts

Recently we have seen identical chemistry in the carbahemiporphyrazines. As can be seen in Figure 4, we have observed this chemistry with the metals manganese, iron, cobalt, copper and silver with the dicarbahemiporphyrazine macrocycle (30, 33). With the exception of copper, which will be described below, both internal C-H bonds are retained upon metalation. The lack of C-H activation in these complexes distorts the macrocycle in these compounds from planarity. Since there are two intact C-H bonds at the core, the planar distortion is much greater than that seen in A -confiised porphyrin. The C-M distances are longer than those seen in iV-confused porphyrins (> 2.4 A), and, based on our H NMR measurement of the Ag(I) complex, the electronic structure of the C-H bond is not greatly perturbed when compared to the free base macrocycle (6.77 ppm in the silver adduct versus 6.91 ppm). 

Pyridazine forms a stable adduct with iodine, with semiconductor properties. " Similar complexes were prepared from iodine mono-ehloride, bromine, and nickel(II) ethyl xanthate. Complexes of pyrida-zines with iron carbonyls and with iron carbonyls and triphenylphosphine have been prepared and investigated. " Complexes of pyridazines with boron trihalides, silver salts, mercury(I) salts, iridium salts, " ruthenium salts, and chromium carbonyls are re-... 

Adducts of the l,2-dithiole-3-thione with silver nitrate and copper dichloride have been described, and for various l,2-dithiole-3-thiones, adducts containing iron, cobalt, nickel, and copper have been studied in more detail. The ligands (L) used are either unsubstituted l,2-dithiole-3-thione or its methyl- or aryl-substituted derivatives. If X represents a halogen atom, the following types of coordination compounds have been characterized CuXLj and CuXLa, FeXjLj, CoXaL, and NiX Lj. Complexes of titanium(III), tin(IV), antimony(III) and (V), and bismuth(III) have also been studied. ... 

Phosphine Chalcogenides as Ligands. - The enhanced stability provided by two triphenylphosphine oxide ligands has enabled the first crystal structure analysis of a non-haem-di-iron-dioxygen adduct. Complexes of the bis(phosphine oxide) (213 Z=0) with copper(I) and copper(II), and of the related disulfide (213 Z=S) with gold(I) and silver(I), have been characterised. 

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