Other N-Donors

Contrary to previous indications, a recent study320 of the products of various synthetic routes to [Co(phen)2(N02)2]+ and [Co(bipy)2(N02)2]+ has shown that only the cis-nitro-isomers can be isolated. Although different crystalline forms of several compounds containing these cations were recognized, a thorough search did not reveal any trans-isomers or nitrito co-ordination. 

Sakuri, T. Sato, and S. Yoshikawa, Bull. Chem. Soc. Japan, 1976, 49, 2100. 

A conformational change, not involving removal of the 5,6-dimethyIbenzimidazole ligand from the co-ordination sphere of the cobalt, has been proposed as an explanation of the temperature dependence of the electronic absorption spectra and n.m.r. 

Condensation of H2CO with [Co(gly)(en)] (gly = glycine ) yields [a-hydroxy-methylserinebis(ethylenediene)cobalt(iii)] and the macrocycle [a-hydroxymethyl-serine-l,4,8,ll-tetra-aza-6,13-dioxacyclotetradecanecobalt(iii)] which forms by 

Cummins and E. P. McKenzie, Inorg. Nuclear Chem. Letters, 1974,12, 521. 

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Complexes of other N-donors A range of pyridine complexes can be made [98]... 

Aliphatic amines are simple lone-pair n-donors, similarly to other n-donors like phosphines, ethers, alcohols, iodides etc. Aromatic amines may be both n- and rr-donors132. Typical rr-donors are polycyclic aromatic derivatives 7r-acceptors are polynitro aromatic derivatives, quinones etc. 

EPR data have been reported for 5-aryl tetrazolate salts of copper(II) values are in the range 2.12-2.15 and the gL and gy values are similar to those recorded for copper(II) complexes of other N donors. Related cobalt and nickel complexes gave complex or unresolved spectra (119). EPR data have been analyzed for the complex salts [Mn(l,5-pmtta)6][C104]2 and [Cu(l,5-pmtta) ][C104]2 (n — 4 and 6). For the copper complexes, copper and nitrogen hyperfine splittings were observed (118). 

We have limited our discussion of n-donor derived radical cations to a single structure type. Other n-donors include hydrazines, polycyclic amines, ethers, phosphines, and thioethers. Several dioxetane radical cations were mentioned in Section 4.1. A detailed or even cursory discussion of these donors exceeds the scope of this article. 

Other N-donors. The preparations of Ni(N2H4)2X2,nH20 (X = F or Br) have been... 

Other N-donor ligands. Nitrile complexes such as [RuX2(RCN)4] (R = Me, Et, Prn, Pr , Ph, or PhCH2 X = Cl or Br) have been prepared from RuC13,3H20... 

Other N-donor ligands. Decomposition of the iron(ii) complex of iV-(2-pyridyl-methylene)-4-methylaniline with edta provides a convenient route to the parent Schiff base (57) however, decomposition in an acetone-water mixture yields... 

Other N-donor ligands. The cation of [Co(py)4C03]C104,H20 has been found to have a distorted octahedral structure, the distortion being due to strain in the four-membered chelate ring (O—C —O angle = 69.3°) and steric hinder-... 

Other N-donor Ligands. [Ni(diphos)(N3)2] reacts with NOBF... 

Other N-donor ligands. The reaction between [Ru(NH3)j(H20)] and hydra-zoic acid has been shown to give rapidly one mole of nitrogen and 0.5 moles of both [Ru(NH3)5] and [Ru(NH3)5(H20)] . The proposed mechanism [equation (4)-( 7)] involves Ru—N bond formation prior to N—cleavage in the azide group. In contrast to similar ruthenium(m) nitrenes the species... 

Other N-donor ligands. Unlike ruthenium chemistry, few osmium nitrosylamines are known. The complexes [Os(NH3)s(NO)]l3 and [OsI(NH3)4(NO)]l2 have now been prepared by treating [Os(NH3)5l]l2 with NO, and their properties compared with analogous ruthenium complexes. The reactions of [0s(NH3)5(N0)]X3,H20 (X = Cl, Br, or I) are summarized in Scheme 5. 

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