Antimony complexes porphyrins

Porphyrin, octaethyl-, antimony hydroxide complex cyclic voltammetry, 4, 399 <73JA5140)... 

Phosphorus, Arsenic, and Antimony Porphyrin Complexes, [MfPorXXXY)]" AND M(PorXXX=0)... 

Electrochemical data have been collected for a selection of the antimony OEP and TPP complexes including [Sb(Por)Me2] and [Sb(Por)(R)(OH)] (R = Me, Et). The complexes show one-electron oxidations and reductions at the porphyrin rings. Spectroelectrochemistry indicated that small amounts of antimony(III) products may be formed through a chemical reaction following the first reduction. " ... 

Shiragami T, Matsumoto J, Inoue H, Yasuda M. Antimony porphyrin complexes as visible-light driven photocatalyst. J Photochem Photobiol C Photochem Rev 2005 6 227-48. 

The reaction of SbCl3 with [(PNR)2(NRLi THF)2] leads to a polycyclic cage complex of the formula [(PNR)2(NR)2 Sb]Cl where antimony is bonded to three nitrogen and one chlorine atom. Antimony in a square planar environment of four nitrogen atoms exists in porphyrins and related macrocycles. Sb-N bonds also exist in antimony azides. The mixed chloride diazide SbCl(N3)2 is formed from NaNs and SbCfr at room temperature. ... 

With other metals, such as nickel (19), palladium (32), platinum (45), antimony (46), and occasionally silver (47) and cobalt (48), the internal C-H bond is broken upon initial metalation. In the case of cobalt and silver N-confused porphyrins, the fully deprotonated adducts are always observed upon metalation, which are shown in Figure 5. In the case of these two metals, the macrocycle takes on different charges trianionic in the case of Ag(III) and dianionic in the case of the Co(III) PPha adduct. W-confused porphyrin can adopt multiple charges, as will be described below. In most of these complexes... 

Oxygen ligands form very stable complexes with hard Lewis-acid met-alloporphyrins such as Sn(IV), Zr(IV), Mn(III), Mo(V), but also with P(V)-porphyrins. Mixed-metal dimers were synthesized from Al(Me)OEP and phosphorus, arsenic or antimony porphyrins in the form of fi-oxo dimers [73]. hi most cases, polymeric structures are obtained because Sn(IV)-, Mn(III)- and Fe(III)-porphyrins can bind two axial ligands on either side of the porphyrin referred to as trans-binding. This is schematically represented in Fig. 25a. An example includes the linear trinuclear or polymers /r-frans-dioxo-MoTPP [74,75]. 

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