Structures of zinc(II) with tetradentate N2S2 ligation

Potenza, Marc N.; Stibrany, Robert T.; Potenza, Joseph A.; Schugar, Harvey J.

doi:10.1107/s0108270191011198

Cited by 8 publications

(10 citation statements)

References 4 publications

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“…Bond distances and angles within the N2S2 ligands compare favorably to those in a monomeric ZnItN2S2 complex, (4), which contains the same ligand (Potenza, Stibrany, Potenza & Schugar, 1992). The Ni--N and Ni--S bond distances in (1) agree favorably with those reported for (3) and are ca.…”

Section: Commentsupporting

confidence: 77%

“…A measure of the distortion from square-planar towards tetrahedral coordination is given by the NiS2/NiN2 dihedral angles, which are 15.7(5) and 15.1 (6) ° for Nil and Ni2, respectively. These distortions are smaller than those found for related Cu" complexes [21.0 (6) and 32.77 (6)°; Potenza, Stibrany, Potenza & Schugar, 1992], reflecting the stronger tendency for d 8 Ni" to form square-planar complexes.…”

Section: Commentmentioning

confidence: 63%

See 1 more Smart Citation

A Mixed-Metal Pentanuclear Complex Containing Linked NiIIN2S2 and CuII Units

Fox¹,

Stibrany²,

Potenza³

et al. 1996

Acta Crystallogr C

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Section: Commentsupporting

confidence: 77%

Section: Commentmentioning

confidence: 63%

A Mixed-Metal Pentanuclear Complex Containing Linked NiIIN2S2 and CuII Units

Fox¹,

Stibrany²,

Potenza³

et al. 1996

Acta Crystallogr C

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“…(c) An attempt to prepare an analogue of rac- 6 with Cu(II) replaced by Zn(II) [e.g., Zn( rac- 1 ) 2 ·3CuCl] yielded rac- 6 ·2DMF instead. In a glovebox containing Ar, Zn(II)( rac- 1 ) (100 mg, 0.29 mmol) was dissolved in 15 mL of dry DMF to give a colorless solution. Then, Cu(I)Cl (80 mg, 0.81 mmol) was added.…”

Section: Methodsmentioning

confidence: 99%

Charge-Transfer Spectra of Structurally Characterized Mixed-Valence Thiolate-Bridged Cu(I)/Cu(II) Cluster Complexes

et al. 2002

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A series of Cu(II) and Cu(I)/Cu(II) complexes containing the cis-N(amine)(2)S(thiolate)(2) copper complex rac-2 has been synthesized to provide a basis for understanding the charge-transfer spectra of mixed-valence thiolate-bridged Cu(I)/Cu(II) complexes. In combination with Cu(Me(2)-13-N(4)ane), rac-2 yields a monobridged dinuclear homovalent adduct, rac-5, while reaction with CuCl yields the mixed-valance pentanuclear complex rac-6. In the presence of Cu(II)(acac)(2), chiral R,R-1 reacts to form a mixed-valence pentanuclear cation R,R-7. rac-6 exhibits a relatively short Cu(I). Cu(II) contact [2.8231(9) A] and associated structural features that suggest the presence of a weak Cu(I).Cu(II) interaction in a valence-trapped system. Additional structural features in rac-6 and R,R-7 include singly and doubly bridging thiolates, three- and four-coordinated Cu(I) ions, and varying Cu(I) ligand sets. These features extend the types and complexities of electronic absorptions significantly. Spectra of rac-6 and R,R-7 exhibit multiple overlapping absorptions over the entire visible and ultraviolet spectral regions studied, consonant with these observations. Trends resulting from variations in structure type and oxidation state permit a first approach toward developing a detailed assignment of the individual ligand Rydberg, LF, LMCT, MLCT, and possible MMCT absorptions in these complexes.

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“…As part of a long-term project designed to aid understanding of the structural and spectroscopic properties of the active sites of selected metalloproteins, we have prepared and characterized numerous low molecular weight analogues (Potenza, Stibrany, Potenza & Schugar, 1992). A particular challenge has been to prepare pseudo-tetrahedral or pseudo-C3v complexes with Cu", an ion whose ligand field CI6H24N6Si strongly favors square-planar or tetragonal coordination geometries.…”

Section: Commentmentioning

confidence: 99%

Tris(3,5-dimethylpyrazol-1-yl)methylsilane

Vepachedu¹,

Stibrany²,

Knapp³

et al. 1995

Acta Crystallogr C

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The structure consists of discrete molecules of tris-(3,5-dimethylpyrazol-1-yl)methylsilane, C16H24N6Si, that exhibit distorted tetrahedral SiN(pyrazole)3C geometry about the Si atom. The Si and methyl C atoms lie on threefold axes. The C--Si--N and N--Si--N bond angles are 111.3 (2) and 107.5 (2) degrees, respectively, while the Si--N bond length is 1.745 (5) A. The present work provides the first reported structure containing an Si--N(pyrazole) linkage.

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Structures of zinc(II) with tetradentate N2S2 ligation

Cited by 8 publications

References 4 publications

A Mixed-Metal Pentanuclear Complex Containing Linked NiIIN2S2 and CuII Units

A Mixed-Metal Pentanuclear Complex Containing Linked NiIIN2S2 and CuII Units

Charge-Transfer Spectra of Structurally Characterized Mixed-Valence Thiolate-Bridged Cu(I)/Cu(II) Cluster Complexes

Tris(3,5-dimethylpyrazol-1-yl)methylsilane

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