Iodo ligand

Coordination of the iodo ligand onto the Ir, Pt and Au surfaces was accomplished by exposure of the clean electrode to 1 mM Nal for 180 seconds at the same pH at which subsequent experiments were to be performed. Unadsorbed iodide was rinsed away with supporting electrolyte. We determined the absolute surface coverage of iodine Tx (mole cm-2) by means of thin-layer coulometry in 1 M H2SO4 using two reactions attributable to the surface iodine, (i) Tj (mole cm-2) is obtainable from the charge for oxidation of adsorbed iodine to aqueous IO3-... 

Surface Coordination of the Iodo Ligand. The chemisorption of iodine at Au, Pt and Ir surfaces has been demonstrated (15-9). Previous studies with single- and polycrystalline Pt (15-7) showed that aqueous iodide undergoes spontaneous oxidation upon chemisorption to form a monolayer of zerovalent iodine ... 

Cu atoms, and two iodo ligands (Fig. 16). The average distance of the two Cu-S bonds (2.3000(11) and 2.3855(10) A) is just somewhat longer than the value in 9. However, the Cu Cu separation of 2.8058(11) A is markedly longer than those observed in the earlier mentioned Cu4I4 unit of 9.145... 

Gel2 reacts with Na[ Cp (CO)2Mn 2H] to form an inidene type compound, [ Cp (CO)2Mn-GeI-Mn(CO)2Cp ] , with Ge in a trigonal planar coordination embedded between two Cp (CO)2Mn groups and an iodo ligand. ... 

The first step involves dissociation of CO to give a 4-coordinate iron(O) intermediate. In the second step, iron is formally oxidized to iron(II) and the coordination number expanded by the addition of two iodo ligands. This second step is an example of oxidative addition. Like most oxidative additions, this step involves an increase by 2 in both the oxidation state and coordination number of the metal. 

The structure of the cyclic tetranuclear iodo (//-oxo) complex [(C5H4Me)TiIO]4 has been determined by X-ray diffraction. The central eight-membered (Ti-0)4 ring deviates appreciably from planarity, with the Cp and iodo ligands located alternately above and below the ring.827... 

Using a lanthanide ion of intermediate size, for example Nd(III), whose preferred coordination number is 9, an interesting and unexpected dodecanuclear complex [Na(H20)2]4[Ndi2(/t3-0H)i6(EDTA)g] was obtained (Figure 93). Its core structure is the same as for the dodecanuclear cluster templated by iodo ligands in the aforementioned Tyr-R coordination studies (Figure 88), but no iodide was employed in the present case. One salient feature of this cluster is the two t) es of Nd... 

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