Some metal sulphamates and their complexes with diamines and pyridine. Evidence for ambidentate behaviour and linkage isomerism of the sulphamate group

Hughes, Martin N.; Lusty, James R.; Barton, T. J.

doi:10.1039/dt9750001478

Cited by 12 publications

(6 citation statements)

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“…Copper sulfamate has been prepared by passing oxygen into a suspension of the metal in sulfamic acid. 242 Copper sulfamate complexes recently reported include the bishalogenocuprates,252 the pyridine complex 62 , 238 and the ethylenediamine complex Interestingly, two forms of copper sulfamate, Cu(NH2S-03)2-2H20, have been recognized. They appear to be linkage isomers involving Nand O-linked sulfamate groups.…”

Section: Cobalt and Nickel Subgroupsmentioning

confidence: 99%

“…They appear to be linkage isomers involving Nand O-linked sulfamate groups. 238 The stability constant for copper sulfamate has been determined from a polarographic study. 253 Zinc and cadmium sulfamates have been prepared by passing oxygen into a suspension of the metal in sulfamic acid.242 Emf measurements, activity coefficient determinations, and freezing point depression measurements have been made on these sulfamates.245 Stability constants were calculated for zinc and cadmium sulfamates at 298 K from potentiometric data on measurements in sodium sulfamate solutions.…”

Section: Cobalt and Nickel Subgroupsmentioning

confidence: 99%

“…254 The complex [Zn(H20)4(NH2S03)2] has sulfamate coordinated to the metal via oxygen. 238 A polarographic study of the neutral sulfamate solutions of Zn11 and Cd11 has shown that complexes involving one, two, and (in the case of zinc) three sulfamate anions, as ligands, are formed. 253 The stability constants of these complexes have been determined.…”

Section: Cobalt and Nickel Subgroupsmentioning

confidence: 99%

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Sulfamic acid and its N-substituted derivatives

Benson¹,

Spillane²

1980

Chem. Rev.

115

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Section: Cobalt and Nickel Subgroupsmentioning

confidence: 99%

Section: Cobalt and Nickel Subgroupsmentioning

confidence: 99%

Section: Cobalt and Nickel Subgroupsmentioning

confidence: 99%

See 1 more Smart Citation

Sulfamic acid and its N-substituted derivatives

Benson¹,

Spillane²

1980

Chem. Rev.

115

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“…Phthalocyanines have also been used to convert light energy to electrical energy in photovoltaic cells4•5 or to sensitize large-gap semiconductors. 6 In this regard, direct relationships have been shown between redox potentials of a given phthalocyanine in solution and yields for conversion of light energy. These important aspects have been the subject of several recent reviews.2,3…”

Section: Introductionmentioning

confidence: 99%

Electrochemical reduction of new, good electron acceptors: the metallooctacyanophthalocyanines

Louati¹,

Meray²,

André³

et al. 1985

Inorg. Chem.

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The electrochemical reduction of octacyanophthalocyanine, MPc(CN)8 (where M = Zn, Cu, H2), was investigated in DMF at Hg and at solid gold or platinum electrodes. Four reversible, single-electron transfer steps were observed for each complex, which corresponded to formation of a mono-, di-, tri-, and tetraanion. Each reduction process was monitored by EPR spectroscopy, which indicated that only the ligand was electroactive. The effect of the eight cyano groups is to decrease the electron density on the ligand, which leads to an easier reduction for each process with respect to the unsubstituted phthalocyanine. The shift of half-wave potentials due to the introduction of eight cyano groups on the metallophthalocyanine ligand does not produce identical potential shifts for different phthalocyanine complexes as was observed in the case of metalloporphyrins. This is perhaps a consequence of the differences in aggregation and surface-active properties between the three phthalocyanines investigated in this study. However, all three species are reduced by four single-electron transfers to yield, ultimately, the formation of a tetraanion.

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“…1 For example, sulfamate complexes of Zn(II), Co(II), Ni(II) and rare-earth ions (La-Lu, Y) are bonded through the oxygen atom, while sulfamate complexes of Pt(II), Pt(IV), Cr(III), and Ru(III) are bonded through the nitrogen atom. 1,[14][15][16][17][18] The strong affinity for metal ions and the differences in coordination behaviour suggest that N-alkylated sulfamic acid derivatives (pK a E À2) 1 could be excellent extractants. However, to the best of our knowledge, such extractants have not been reported yet.…”

mentioning

confidence: 99%