The Cambridge Structural Database

Allen, Frank H.; Lipscomb, Karen J.

doi:10.1081/e-esmc-120012882

Cited by 14 publications

(18 citation statements)

References 23 publications

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“…With respect to bond angles, the P(1)-Pd-P(2) angle (90.78(3)°) is similar to those reported in [Pd(OTf)-(H 2 O)(dppp)](OTf) [42] and [Pd(OTs)(H 2 O)(dppp)](OTs) [32], and is also close to the average of 92.5°found in about thirty analogous Pd compounds [40]; on the other hand, the O (1) Fig. 1.…”

Section: Characterization and X-ray Structure Of Complex (I)supporting

confidence: 68%

“…To the best of our knowledge, this is the first example of a Pd(II) complex with a chelating sulfate dianion. A search in the Cambridge Crystallographic Database (CCD) [40] for square planar Pd(II) complexes showing the (P \ P)O 2 donor set and at least one oxygen bound to a sulfur atom (P \ P = bidentate neutral phosphorous ligand) returned five entries [11,41,42]. The main geometrical parameters for the reported structures are listed in Table 3.…”

Section: Characterization and X-ray Structure Of Complex (I)mentioning

confidence: 99%

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Synthesis, characterization and X-ray structure of [Pd(SO4)(dppp)]·H2O, a catalyst for the CO-ethene copolymerization [dppp=1,3-bis(diphenylphosphino)propane]

Cavinato

Vavasori

Toniolo

et al. 2005

Inorganica Chimica Acta

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The title complex has been synthesized by first reacting dppp with Pd(AcO) 2 in acetone and then with NaHSO 4 in water. It has been characterized by IR, NMR and X-ray diffraction studies. The 31 P NMR spectrum in DMSO shows a singlet at 16.62 ppm indicating that the two P atoms are equivalent and that the sulfate anion is weakly coordinating. The X-ray structure shows that the Pd atom is surrounded in an almost regular square planar environment by the two P atoms and by two O atoms of the sulfate anion and that the neutral complex is accompanied by a water molecule of crystallization. The Pd-P distances (2.217(1) and 2.233(1)) and the P-Pd-P angle (90.78(3)°) are close to those found in other complexes where the chelating diphosphine is the same. Also the Pd-O distances and the O-Pd-O bond angle are comparable to those of other relevant chelating ligands.In MeOH, the title complex, in combination with H 2 SO 4 , catalyses the CO-ethene copolymerization. The productivity reaches a maximum upon increasing the H 2 SO 4 /Pd ratio up to ca. 470 (7650 g of polyketone/g Pd h at 90°C and 45 atm, CO/ethene 1/1). The viscosity of the polyketone passes through a maximum of 0.95 dL/g in m-cresol when the above ratio is ca. 100. It has been proposed that acid promotes the copolymerization process by destabilizing the b-and c-chelates intermediates involved in chain growing process, thus favoring the insertion of the monomers. At relatively high acid concentration the lowering of productivity and viscosity suggests that the sulfate anion competes with the monomers for the coordination to the metal center.In H 2 O-CH 3 COOH as a solvent the productivity strongly depends on the H 2 O/CH 3 COOH ratio, as it passes through a maximum of 12 000 g polymer/g Pd h in the presence of ca. 60% of H 2 O. The productivity is significantly lower than that found when the acetate and chloride analogues are used (27 000 g polyketone/g Pd AE h). Thus, it is likely that the sulfate anion assists significantly the copolymerization process even though the concentration of CH 3 COOH/CH 3 COO À is much preponderant.

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Section: Characterization and X-ray Structure Of Complex (I)supporting

confidence: 68%

Section: Characterization and X-ray Structure Of Complex (I)mentioning

confidence: 99%

Synthesis, characterization and X-ray structure of [Pd(SO4)(dppp)]·H2O, a catalyst for the CO-ethene copolymerization [dppp=1,3-bis(diphenylphosphino)propane]

Cavinato

Vavasori

Toniolo

et al. 2005

Inorganica Chimica Acta

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“…The obtained values of the interatomic distances do not differ from those found in the complex diaqua-(2',2'''-(2,6-pyridinediyldiethylidyne)dioxamohydrazide)-iron(III) perchlorate hydrate [27,28]. In the Cambridge Structural Database 47 hits on structures of compounds of transition metals with ligands of this class are reported [29], mainly manganese or cobalt compounds, only 6 of them being iron compounds [27][28][29][30][31][32][33].…”

Section: Chemistrymentioning

confidence: 99%

Structure and Some Biological Properties of Fe(III) Complexes with Nitrogen-Containing Ligands

Bulhac¹,

Deseatnic-Ciloci²,

Боурош³

et al. 2016

ChemJMold

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Abstract. Four coordination compounds of iron(III) with ligands based on hydrazine and sulfadiazine: [Fe(dig) 2 -2,6-diacetylpyridine bis(isonicotinoylhydrazone) were synthesized. The spectroscopic and structure characterisation, as well as their biological properties, are presented. All tested coordination compounds, caused an inhibitory effect on the biosynthesis of hydrolases of the producer Aspergillus niger CNMN FD-10. The effect increased with the raise of the concentration from 5 mg/L to 15 mg/L. The complexes largely inhibited cellobiohydrolase and less-β-glucosidase. The inhibitory effect of the coordination compounds was quite similar in the case of endoglucanase and xylanase. Compound I, containing both chloride ions and dig, demonstrated a stronger inhibitory effect, while compound III, containing NO 3 -ions, showed the weakest inhibitory action.Keywords: iron complexes, nitrogen-containing ligands, structure, biological properties. IntroductionIn the modern microbiology, investigation of the effects of external factors on the physiology of microorganisms remains an actual issue. Such studies allow solving the practical problems and implementation of the new technologies in biology and medicine.The literature, in the last decades, denotes high physiological activity of the coordination compounds of transition metals on biological objects, including microorganisms [1][2][3][4][5][6][7][8][9][10][11][12][13]. Some authors note a signifi cant role of these compounds in the directed synthesis of biologically active substances from microalgae and cyanobacteria, fi lamentous fungi and yeast [1][2][3][4][5][6][7][8][9][10]12].Studies of the effects of coordination compounds on biosynthesis of extracellular hydrolases in fi lamentous fungi have been previously carried out [3][4][5][6][7]14]. It was established that these effects depend both on the properties of compounds (chemical composition, molecular structure, nature of the ligand and coordinated metal atom) and genus and species of the micromycetes strains, and specifi city of the synthesized enzymes [3][4][5][6][7]14]. Some coordination compounds exhibit a selective action on the components of the synthesized enzyme complex. Thus, by adding the molybdenum complex with valine -MoO 2 (acac) 2 Val (acac=acetylacetone, Val=valine) into the nutrient medium, the biosynthesis of β-glucosidase in micromycete Penicillium expansum CNMN FD 5C -producer of cellulases was enhanced by 69.4%, while the level of endoglucanase and cellobiohydrolase was not modifi ed. Study of the infl uence of (NH 4 ) 2 VO 2 Gly (Gly=glycine) on biosynthesis of cellulases of the same strain showed that the dioxovanadium complex increased the activity of all components of cellulase complex by 17.6-40.3% [14].The targeted application of the coordination compounds of 3d-elements as regulators of the microbial synthesis of bioactive substances requires accumulation of factual material on the nature of their infl uence on all phases of the development of microorganisms and also identifi ca...

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“…The bonds between Co and the terminal thiophenolate, Co-S(1), and one of the bridging thiophenolates, Co-S(3), are within the normal range for Co (III)-thiolate bonds, while the bonds to the other bridging thiophenolate, Co-S(1a), and to the thioether, Co-S(2), are among the longest reported. [37] The dimer crystallizes along with two H 2 O molecules and two methanol molecules; one methanol is disordered over three sites.…”

Section: Syntheses and Structural Descriptionsmentioning

confidence: 99%

Incorporation of thiolate donation using 2,2′-dithiodibenzaldehyde: Complexes of a pentadentate N2S3 ligand with relevance to the active site of Co nitrile hydratase

Smucker

VanStipdonk

Eichhorn

2007

Journal of Inorganic Biochemistry

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The use of 2,2′-dithiodibenzaldehyde (DTDB) as a reactant for incorporating thiolate donors into the coordination sphere of a transition metal complex without the need for protecting groups is expanded to include the synthesis of complexes with pentadentate ligands. The ligand N,N′-bis (thiosalicylideneimine)-2,2′-thiobis(ethylamine) (tsaltp) is synthesized at a cobalt center by the reaction of DTDB with a Co complex of thiobis(ethylamine). The resulting Co complexes are thus coordinated by the N 2 S 3 pentadentate ligand through two imine N atoms, two thiolate S atoms, and one thioether S atom. A dimeric, bis-thiolate-bridged complex (1) is isolated and converted to a monomeric CN adduct (2) by treatment with KCN. The N 2 S 3 coordination environment provided by the tsaltp ligand is similar to that provided by the protein donors at the active site of the nitrile hydratase enzymes, with 2 being the first octahedral Co complex reported with such a coordination sphere.

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The Cambridge Structural Database

Cited by 14 publications

References 23 publications

Synthesis, characterization and X-ray structure of [Pd(SO4)(dppp)]·H2O, a catalyst for the CO-ethene copolymerization [dppp=1,3-bis(diphenylphosphino)propane]

Synthesis, characterization and X-ray structure of [Pd(SO4)(dppp)]·H2O, a catalyst for the CO-ethene copolymerization [dppp=1,3-bis(diphenylphosphino)propane]

Structure and Some Biological Properties of Fe(III) Complexes with Nitrogen-Containing Ligands

Incorporation of thiolate donation using 2,2′-dithiodibenzaldehyde: Complexes of a pentadentate N2S3 ligand with relevance to the active site of Co nitrile hydratase

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