Synthesis and complexation of the novel tridentate anionic organogallate ligands, [Me2Ga(N2C5H7)(OCH2CH2SR)]− (R = Et or Ph)

1981 ◽  
Vol 59 (9) ◽  
pp. 1331-1341 ◽  
Author(s):  
Kenneth S. Chong ◽  
Alan Storr
Keyword(s):  
Carbonyl Compounds ◽  
Coordination Mode ◽  
The Novel ◽  
Steric Factors ◽  
Manganese Carbonyl

The synthesis and complexation of the novel tridentate chelating anionic organogallate ligands [Me2Ga(N2C5H7)(OCH2CH2SR)]− (R = Et or Ph) have been investigated. A variety of octahedral molybdenum, tungsten, and manganese carbonyl compounds have been studied in which the organogallate ligand (R = Et) is in the fac coordination mode. In addition tetrahedral "Cu•PPh3" and "Ni(NO)" complexes have been characterized which display fluxional behaviour in solution. The dearth of derivatives available using the ligand where R = Ph is attributed to steric factors.

Molybdenum, tungsten, and manganese carbonyl compounds incorporating novel tridentate chelating dimethyl(1-pyrazolyl)(ethanolamino)gallate ligands

1979 ◽  
Vol 57 (2) ◽  
pp. 167-173 ◽  
Author(s):  
Kenneth S. Chong ◽  
Alan Storr
Keyword(s):  
Carbonyl Compounds ◽  
Amino Nitrogen ◽  
Chelating Ligands ◽  
Spectroscopic Measurements ◽  
Methyl Substitution ◽  
Carbonyl Derivatives ◽  
Site Preferences ◽  
Steric Factors ◽  
Manganese Carbonyl ◽  
Manganese Compounds

The coordinating properties of the tridentate tris-chelating ligand, [Me2Ga(OCH2CH2NH2)(N2C3H3)]−, and its three methyl substituted derivatives (methyl substitution on the amino nitrogen and the 3,5 positions of the pyrazolyl ring) have been studied in a series of molybdenum, tungsten, and manganese carbonyl compounds. Mixed allyl carbonyl and nitrosyl carbonyl compounds of both molybdenum and tungsten have been characterized, and a series of tricarbonyl manganese compounds studied. All the complexes are monomeric octahedral species having the tris-chelating ligands in fac coordination. Steric factors influence the arrangement of the three remaining groups in the mixed octahedral complexes (i.e. allyl carbonyl and nitrosyl carbonyl derivatives) and particular site preferences are inferred from spectroscopic measurements.

scholarly journals Binuclear Rhenium and Manganese Carbonyl Compounds Containing Hetero-Mercaptanes

2012 ◽  
Vol 25 (1) ◽  
pp. 62-70 ◽  
Author(s):  
Md Anwarul Hoque ◽  
Md Arzu Miah ◽  
Md Nurul Abser ◽  
Abul K Azad ◽  
Kamrun N Khan ◽  
...  
Keyword(s):  
Ambient Temperature ◽  
Spectral Data ◽  
1H Nmr ◽  
Metal Atom ◽  
Carbonyl Compounds ◽  
Chemical Society ◽  
Mass Spectral Data ◽  
Heterocyclic Ligands ◽  
Mass Spectral ◽  
Manganese Carbonyl

Treatment of 2-Mercaptothiazoline, 2-Mercaptobenzimidazole, 2-Mercapto-1- methylimidazole with [M2(CO)10] (M = Re and Mn) at ambient temperature in presence of decarbonylating reagent Me3NO give the complexes [Mn2(?-?2-C3H4NS2)2(CO)6] (1), [Re2(?-?2-C3H4NS2)2(CO)6] (2), [Mn2(?-?2-C7H5SN2)2(CO)6] (3), [Re2(?-?2- C7H5SN2)2(CO)6] (4), [Re2(?-?2-C4H5N2S)2(CO)6] (5) and [Re2(?1-C4H5N2SH)(CO)9] (6) respectively. All the compounds have been characterized by IR, 1H NMR and mass spectral data. The heterocyclic ligands are expected to be coordinated to two or single metal atom through the nitrogen and sulfur atoms or via only sulfur atom.DOI: http://dx.doi.org/10.3329/jbcs.v25i1.11775 Journal of Bangladesh Chemical Society, Vol. 25(1), 62-70, 2012> 

scholarly journals Unprecedented η3-Coordination and Functionalization of the 2-Phosphaethynthiolate Anion at Lanthanum(III)

2021 ◽  
Author(s):  
Fabian A. Watt ◽  
Lukas Burkhardt ◽  
Roland Schoch ◽  
Stefan Mitzinger ◽  
Matthias Bauer ◽  
...  
Keyword(s):  
Reaction Mechanism ◽  
Dft Calculations ◽  
Coordination Mode ◽  
Quantum Mechanical ◽  
Structural Comparison ◽  
Anion Complex ◽  
Steric Factors ◽  
Group 15 ◽  
Detailed Reaction Mechanism ◽  
The Ideal

We present the unprecedented <i>η</i>3-coordination of the 2-phosphaethynthiolate anion in the complex (PN)<sub>2</sub>La(SCP) (<b>2</b>) [PN = N-(2-(diisopropylphosphanyl)-4-methylphenyl)-2,4,6-trimethylanilide)]. Structural comparison with dinuclear thiocyanate bridged (PN)<sub>2</sub>La(<i>μ</i>-1,3-SCN)<sub>2</sub>La(PN)<sub>2</sub> (<b>3</b>) and azide bridged (PN)<sub>2</sub>La(<i>μ</i>-1,3-N3)<sub>2</sub>La(PN)<sub>2</sub> (<b>4</b>) complexes indicates that the [SCP]<sup>–</sup> coordination mode is mainly governed by electronic, rather than steric factors. Quantum mechanical investigations reveal large contributions of the antibonding π-orbital of the [SCP]<sup>–</sup> ligand to the LUMO of complex <b>2</b>, rendering it the ideal precursor for the first functionalization of the [SCP]<sup>–</sup> anion. Complex <b>2</b> was therefore reacted with CAACs which induced a selective rearrangement of the [SCP]<sup>–</sup> ligand to form the first CAAC stabilized group 15 – group 16 fulminate-type complexes (PN)<sub>2</sub>La{SPC(<sup>R</sup>CAAC)} (<b>5a,b</b>) (R = Ad, Me). A detailed reaction mechanism for the SCP to SPC isomerization is proposed based on DFT calculations.

Tandem dihetero-Diels–Alder and Huisgen cycloaddition reactions. Synthesis, crystal structure and hydrolysis of the novel cage phosphoranes

2018 ◽  
Vol 5 (21) ◽  
pp. 3113-3128 ◽  
Author(s):  
Nadezhda R. Khasiyatullina ◽  
Tamara A. Baronova ◽  
Ekaterina V. Mironova ◽  
Robert R. Fayzullin ◽  
Igor A. Litvinov ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Carbonyl Compounds ◽  
Diels Alder ◽  
Cycloaddition Reactions ◽  
The Novel ◽  
Hydrolysis Of

The reaction of 2-(1-phenylvinyloxy)benzo-1,3,2-dioxaphosphole with activated carbonyl compounds leads to the stereoselective formation of cage phosphoranes.

Chemical reactions in solid manganese carbonyl compounds

1971 ◽  
Vol 26 (1) ◽  
pp. 119-124 ◽  
Author(s):  
I.G. de Jong ◽  
S.C. Srinivasan ◽  
D.R. Wiles
Keyword(s):  
Chemical Reactions ◽  
Carbonyl Compounds ◽  
Manganese Carbonyl

Rhenium and manganese carbonyl compounds incorporating tridentate chelating pyrazolyl gallate ligands

1985 ◽  
Vol 63 (8) ◽  
pp. 2261-2272 ◽  
Author(s):  
Brenda M. Louie ◽  
Steven J. Rettig ◽  
Alan Storr ◽  
James Trotter
Keyword(s):  
Carbonyl Compounds ◽  
Reducing Agents ◽  
X Ray ◽  
H Nmr ◽  
Structure Determinations ◽  
Manganese Carbonyl ◽  
Rhenium Tricarbonyl ◽  
Mode Of Coordination ◽  
Selection Of

The coordinating properties of a variety of unsymmetrical uninegative tridentate chelating "pyrazolylgallate" ligands have been studied using the tricarbonyl moieties "M(CO)3", where M = Mn or Re, as acceptor species. A series of monomeric, pseudo octahedral complexes has been characterized and a fac mode of coordination established for the tridentate gallate ligands from 1H nmr, ir measurements, and X-ray structure determinations. Nitrosylation of a selection of the rhenium tricarbonyl compounds has yielded a number of cationic rhenium mononitrosyl dicarbonyl species. The reactivity of these cations towards reducing agents has been investigated.

A new two-dimensional manganese(II) coordination polymer based on thiophene-3,4-dicarboxylic acid

2014 ◽  
Vol 70 (7) ◽  
pp. 715-717
Author(s):  
Gui-Xia Wang ◽  
Li-Li Shang ◽  
Zhao-Hao Li ◽  
Bang-Tun Zhao
Keyword(s):  
Coordination Polymer ◽  
Dicarboxylic Acid ◽  
Ir Spectrum ◽  
Coordination Mode ◽  
The Novel ◽  
Two Dimensional ◽  
Asymmetric Unit ◽  
One Dimensional ◽  
Carboxylate Groups ◽  
Organic Linker

A novel manganese coordination polymer, poly[(μ5-thiophene-3,4-dicarboxylato)manganese(II)], [Mn(C6H2O4S)]n, was synthesized hydrothermally using 3,4-thiophenedicarboxylate (3,4-tdc2−) as the organic linker. The asymmetric unit of the complex contains an Mn2+cation and one half of a deprotonated 3,4-tdc2−anion, both residing on a twofold axis. Each Mn2+centre is six-coordinated by O atoms of bridging/chelating carboxylate groups from five 3,4-tdc2−anions, forming a slightly distorted octahedron. The Mn2+centres are bridged by 3,4-tdc2−anions to give an infinite two-dimensional layer which incorporates one-dimensional Mn–O gridlike chains, and in which the 3,4-tdc2−anion adopts a novel hexadentate chelating and μ5-bridging coordination mode. The fully deprotonated 3,4-tdc2−anion exhibits unexpected efficiency as a ligand towards the Mn2+centres, which it coordinates through all of its carboxylate O atoms to provide the novel coordination mode. The IR spectrum of the complex is also reported.

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