Systematic stereochemistry of metal(II) thiolates: synthesis and structures of [M2(SC2H5)6]2- (M = Mn(II), Ni(II), Zn(II), Cd(II))

Watson, Alan D.; Rao, Ch. Pulla; Dorfman, Jay R.; Holm, R. H.

doi:10.1021/ic00212a024

Cited by 120 publications

(28 citation statements)

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“…4) which corresponds to that identified for the [Zn2(SR)6] 2-(R = Et [22] or Ph [20,23]) anions. The [20,22,23]. These results clearly suggest that each monomer of the Zn(II) form of PPR 1 contains a bimettalic cluster, in which each zinc ion is tetrahedrally co-ordinated by four cysteine residues, two of which act as bridging ligands between the two neighbouring zinc atoms (see Fig.…”

Section: Discussionsupporting

confidence: 70%

See 1 more Smart Citation

Zinc co‐ordination in the DNA‐binding domain of the yeast transcriptional activator PPR1

Ball¹,

Diakun

Gadhavi³

et al. 1995

FEBS Letters

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The structure of the native zinc form of the DNA binding domain in the yeast transcriptional activator PPR1 was investigated by extended X-ray absorption fine structure (EXAFS). By carrying out the EXAFS measurements at llk we were able to demonstrate explicitly the proximity of the two zinc ions (Zn-Zn distance = 3.16 + 0.03 A) and the presence of bridging cysteine ligands. The results show that the six cysteine residues co-ordinate two zinc ions in a two-metal ion cluster. PPR1 is the first member of this class of protein for which such information has been obtained.

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Section: Discussionsupporting

confidence: 70%

“…We propose that the two zinc ions are each co-ordinated by four sulphurs, two from terminal and two from bridging cysteines, in an arrangement (see Fig. 4) which corresponds to that identified for the [Zn2(SR)6] 2-(R = Et [22] or Ph [20,23]) anions. The [20,22,23].…”

Section: Discussionmentioning

confidence: 64%

Zinc co‐ordination in the DNA‐binding domain of the yeast transcriptional activator PPR1

Ball¹,

Diakun

Gadhavi³

et al. 1995

FEBS Letters

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“…Moreover, for both complexes, the presence of SÁ Á ÁS was convincing. The obtained SÁ Á ÁS interaction distances of 5 and 6 (3.544 Å for 5 and 3.713 Å for 6, respectively) are shorter than those of 2 (3.827 Å ), 3 (4.149 Å ), [{M(SPh) 2 } 2 (l-SPh) 2 ] 2À (M = Zn(II) (3.835(9) Å ) and Cd(II) (4.130(9) Å )), and [{Zn(SEt) 2 } 2 (l-SEt) 2 ] 2À (3.848(8) Å ) [52]. These results suggest that structures of 5 and 6 contain only S b Á Á ÁS b interaction similar to S b Á Á ÁS b of 2 (4.594(2) Å [11]) and 3 (3.891(1) Å [31]), and are much shorter than the S b Á Á ÁS t and S t Á Á ÁS t .…”

Section: Sulfur K-edge Exafs Spectroscopymentioning

confidence: 99%

Sulfur K-edge extended X-ray absorption fine structure spectroscopy of homoleptic thiolato complexes with Zn(II) and Cd(II)

Matsunaga

Fujisawa

Ibi

et al. 2006

Journal of Inorganic Biochemistry

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“…Watson, Rao, Dorfman & Holm, 1985;Rao, Dorfman & Holm, 1986;Snyder, Rao & Holm, 1986;Bianconi et ai., 1987;Vrtis, Rao, Warner & Lippard, 1988;Villacorta, Rao & Lippard, 1988). Selection and mounting of crystals are performed in a glove (dry) box maintained under an inert atmosphere such as nitrogen or argon.…”

Section: Methods Developedmentioning

confidence: 99%

Rationale of a quick adjustment method for crystal orientation in oscillation photography. Erratum

Suh¹,

Suh²,

Ko³

et al. 1989

J Appl Cryst

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We have developed the following methods and successfully applied them in the case of several highly air-sensitive inorganic and organometallic compounds without the use of a cold stream of nitrogen (e.g. Watson, Rao, Dorfman & Holm, 1985;Rao, Dorfman & Holm, 1986;Snyder, Rao & Holm, 1986; Bianconi et ai., 1987;Vrtis, Rao, Warner & Lippard, 1988;Villacorta, Rao & Lippard, 1988). Selection and mounting of crystals are performed in a glove (dry) box maintained under an inert atmosphere such as nitrogen or argon. While working, we found interesting ways of splitting multiple crystals (aggregates), sizing them to the required dimensions and also shaping them to minimize absorption effects, simply by rubbing these crystals gently on the gloves (inside the dry box) and/or rolling them in a small pool of solvent in which the compound is moderately soluble. While rubbing the crystals on the gloves, we were often able to differentiate powdered lumps from single crystals. This method overcomes the use of a microscope in the dry box. Satisfactory crystals are loaded into Lindemann-glass capillaries of appropriate size and wedged into the narrow portion, often with a light touch of apeizon grease that is free from heavy elements. Application of the apeizon grease not only ensures the position of the crystal in the capillary (free from wobbling), but also provides extra protection from deterioration by unidentified means through the formation of a thin film on the crystal. Crystals losing solvent of crystallization and/or becoming opaque outside the mother liquor are coated with a thin film of '5-minute' epoxy resin. Of course, in this case apeizon grease is not required. The open ends of these loaded capillaries, normally cup portions, are plugged with vacuum grease or candle wax before being brought out of the glove box. Immediately after they are brought out, these are sealed in a fine flame. Subsequently, selection of good crystals suitable for X-ray diffraction is done by examining these sealed capillaries under a microscope, preferably in polarized light.This method has worked successfully for a large number of very air-sensitive and thermal-insensitive (at ambient temperatures) compounds and yields good X-ray diffraction data at minimum cost, besides providing convenient and easy handling techniques. No cold stream of liquid nitrogen has been used in this process. These methods are, in fact, applied routinely in our laboratories to handle highly airsensitive compounds and to collect their X-ray diffraction intensities. It is conceivable that this method will provide single crystals of air-sensitive compounds suitable not only for X-ray diffraction studies but also for other physicochemical measurements. AbstractSWATAB is a Fortran IV computer program which helps in obtaining most of the required tables for crystal structure publication from the widely used SHELX76 program output. The strategy, installation, required local modifications, merits and limitations are discussed.

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Systematic stereochemistry of metal(II) thiolates: synthesis and structures of [M2(SC2H5)6]2- (M = Mn(II), Ni(II), Zn(II), Cd(II))

Cited by 120 publications

References 0 publications

Zinc co‐ordination in the DNA‐binding domain of the yeast transcriptional activator PPR1

Zinc co‐ordination in the DNA‐binding domain of the yeast transcriptional activator PPR1

Sulfur K-edge extended X-ray absorption fine structure spectroscopy of homoleptic thiolato complexes with Zn(II) and Cd(II)

Rationale of a quick adjustment method for crystal orientation in oscillation photography. Erratum

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