Synthesis, structure and magnetic characterization of the first azido bridged heterotetranuclear chromium-sodium complex

Hosseini‐Monfared, Hassan; Bikas, Rahman; Siczek, Miłosz; Lis, Tadeusz; Szymczak, R.; Aleshkevych, P.

doi:10.1016/j.inoche.2013.06.009

Cited by 34 publications

(6 citation statements)

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“…The amidic hydrogen atoms of the ligands have been eliminated during the complexation. The C8–O4 and C8–N2 bond lengths are close to those reported previously for hydrazone‐based ligands coordinated to metal centres in the enolic form . This finding indicates that ligands H 2 L 1a–c , H 2 L 2b and H 2 L 3c act as tridentate dianionic ligands in the reported Mo complexes.…”

Section: Resultssupporting

confidence: 88%

“…1.69 Å) confirm the presence of Mo=O double bonds. The C8–O4 and C8–N2 bond lengths are close to those reported previously for hydrazone‐based ligands coordinated to metal centres in the enolic form . Several C–H ··· O, C–H ··· π and π ··· π interactions in the crystal packings of 4 and 6 stabilize the crystal structures and convert the one‐dimensional polymeric chains to two‐dimensional polymeric sheets (Figures S6 and S7).…”

Section: Resultssupporting

confidence: 85%

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Electronic Effects of Aromatic Rings on the Catalytic Activity of Dioxidomolybdenum(VI)–Hydrazone Complexes

et al. 2017

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A note on versions:The version presented here may differ from the published version or from the version of record. If you wish to cite this item you are advised to consult the publisher's version. Please see the repository url above for details on accessing the published version and note that access may require a subscription. This manuscript has been accepted after peer review and appears as an Accepted Article online prior to editing, proofing, and formal publication of the final Version of Record (VoR). This work is currently citable by using the Digital Object Identifier (DOI) given below. The VoR will be published online in Early View as soon as possible and may be different to this Accepted Article as a result of editing. Readers should obtain the VoR from the journal website shown below when it is published to ensure accuracy of information. The authors are responsible for the content of this Accepted Article. FULL PAPER Electronic effects of aromatic rings on the catalytic activity of dioxidomolybdenum(VI)-hydrazone complexesRahman Bikas, [a,*] Vito Lippolis, [b,*] Nader Noshiranzadeh, [a] Hossein Farzaneh-Bonab, [a] Alexander J. Blake, [c] Milosz Siczek, [d] Hassan Hosseini-Monfared, [a] and Tadeusz Lis [d] Abstract:Nine dioxidomolybdenum(VI) complexes were synthesized by the reaction of MoO3 with tridentate hydrazone Schiff base ligands obtained from the reaction of aromatic acid hydrazides (3-hydroxy-2-naphthoic acid hydrazide, 4-pyridine carboxylic acid hydrazide or 2-furane carboxylic acid hydrazide) and ortho-hydroxy aldehyde derivatives (5-iodo-2-hydroxybenzaldehyde, 2-hydroxy-1-naphthaldehyde or 2-hydroxy-3-methoxybenzaldehyde). All ligands and complexes were characterized by elemental analysis and spectroscopic methods. The structures of seven complexes were further elucidated by single-crystal X-ray diffraction analysis which indicated a distorted octahedral geometry at the metal centre. Spectroscopic and X-ray analyses indicated that the ligands are coordinated to the molybdenum(VI) ion as dinegative ligands due to deprotonation of phenolic OH and amidic NH groups upon complexation. These complexes were used as catalyst in the oxidation of cyclooctene and thioanisole in the presence of hydrogen peroxide as environmental friendly oxidant. In order to achieve the highest catalytic activity, the effects of important parameters such as solvent, temperature and the molar ratio of oxidant to substrate were optimized. The results indicate that electron-withdrawing substituents on the ligands increase the catalytic activity of dioxidomolybdenum(VI)-hydrazone complexes.

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Section: Resultssupporting

confidence: 88%

Section: Resultssupporting

confidence: 85%

Electronic Effects of Aromatic Rings on the Catalytic Activity of Dioxidomolybdenum(VI)–Hydrazone Complexes

et al. 2017

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“…S1†). 26 The band at 3221 cm −1 is attributed to the amidic NH and the bands observed at 3358 and 3440 cm −1 can be attributed to free –NH 2 and phenolic OH groups, respectively. 27 The broad band of the OH group overlaps with the bands of NH 2 and NH groups.…”

Section: Resultsmentioning

confidence: 95%

Green carbon–carbon homocoupling of terminal alkynes by a silica supported Cu(ii)-hydrazone coordination compound

et al. 2023

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“…[30][31][32] Among metal complexes, those featuring polynuclear motifs are particularly captivating, in that the cooperation of two or more metal ions in creating the active center offers the chance to achieve receptors able to form stable and selective adducts also by virtue of the tunable distance between the metal centers. [33][34][35][36][37] Few examples of hetero-tetranuclear complexes mixing transition and main group metal ions are reported in the literature, [38][39][40][41][42][43][44][45][46][47] even less are related to (Cu 2 + Ca 2 + ) 2 complexes. [48][49][50][51] Recently we reported hetero-tetranuclear complexes incorporating both a transition metal ion (Cu 2 + ) and a main group cation (Ca 2 + ) assembled by the ligand Malten (L, N,N'-bis((3hydroxy-4-pyron-2-yl)methyl)-N,N'-dimethylethylendiamine, Figure 1).…”

Section: Introductionmentioning

confidence: 99%

“…Among metal complexes, those featuring polynuclear motifs are particularly captivating, in that the cooperation of two or more metal ions in creating the active center offers the chance to achieve receptors able to form stable and selective adducts also by virtue of the tunable distance between the metal centers [33–37] . Few examples of hetero‐tetranuclear complexes mixing transition and main group metal ions are reported in the literature, [38–47] even less are related to (Cu 2+ Ca 2+ ) 2 complexes [48–51] …”

Section: Introductionmentioning

confidence: 99%

A Tetranuclear Copper(II)/Calcium(II) Complex as Dual Chemosensor for Colorimetric and Fluorescent Detection of Non‐Steroidal Anti‐Inflammatory Drugs

et al. 2023

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The tetranuclear Cu2+/Ca2+/Ca2+/Cu2+ complex based on Malten ligand has been investigated as a platform for anion binding. Simple organic carboxylates and non‐steroidal anti‐inflammatory drugs (NSAIDs) have been tested, revealing the ability of the platform to bind them. The receiving platform hosts at least two guests in solution although a third anion can be bound, as suggested by X‐ray diffraction analysis. The addition of the anions is accompanied by a color change of the solution, making the system a colorimetric sensor for carboxylates (LOD values comprised between 3.6 and 20.7 ppm). A fluorescent system consisting of the 2‐(3‐oxido‐6‐oxoxanthen‐9‐yl)benzoate (fluorescein anion) linked to the tetranuclear platform has been also prepared and used in a chemosensing ensemble approach to signal the presence of the selected anions (Log K between 2.6 and 5.6 for the addition of two guests). The latter also works in a paper strip test, offering the chemosensor a possible practical application.

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Synthesis, structure and magnetic characterization of the first azido bridged heterotetranuclear chromium-sodium complex

Cited by 34 publications

References 38 publications

Electronic Effects of Aromatic Rings on the Catalytic Activity of Dioxidomolybdenum(VI)–Hydrazone Complexes

Electronic Effects of Aromatic Rings on the Catalytic Activity of Dioxidomolybdenum(VI)–Hydrazone Complexes

Green carbon–carbon homocoupling of terminal alkynes by a silica supported Cu(ii)-hydrazone coordination compound

A Tetranuclear Copper(II)/Calcium(II) Complex as Dual Chemosensor for Colorimetric and Fluorescent Detection of Non‐Steroidal Anti‐Inflammatory Drugs

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