Structures of dichlorobis(trimethylamine oxide)cobalt(II), diiodobis(trimethylamine oxide)cobalt(II), dichlorobis(trimethylamine oxide)zinc and dibromobis(trimethylamine oxide)zinc

Jin, Shouwen; Nieuwenhuyzen, Mark; Robinson, WT; Wilkins, C. J.

doi:10.1107/s0108270191010223

Cited by 4 publications

(3 citation statements)

References 12 publications

(19 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The structure of 6 (Supporting Information, Figure S1) exhibits pseudo-tetrahedral geometry at the Fe(III) center, which is ligated by three ditox ligand and ONMe 3 . The N–O bond distance in 6 is 1.397(2) Å, which falls within a usual range of values (1.38–1.40 Å) found for unactivated ONMe 3 (as provided by a CSD search that delivered 32 structures). − …”

Section: Resultsmentioning

confidence: 99%

Iron in a Trigonal Tris(alkoxide) Ligand Environment

et al. 2013

View full text Add to dashboard Cite

Mononuclear Fe(II) and Fe(III) complexes residing in a trigonal tris(ditox) (ditox = (t)Bu2(Me)CO(-)) ligand environment have been synthesized and characterized. The Fe(III) ditox complex does not react with oxidants such as PhIO, whereas NMe3O substitutes a coordinated tetrahydrofuran (THF) in the apical position without undergoing oxo transfer. In contrast, the Fe(II) ditox complex reacts rapidly with PhIO or Me3NO in THF or cyclohexadiene to furnish a highly reactive intermediate, which cleaves C-H bonds to afford the Fe(III)-hydroxide complex. When generated in 1,2-difluorobenze, this intermediate can be intercepted to oxidize phosphines to phosphine oxide. The fast rates at which these reactions occur is attributed to a particularly weak ligand field imparted by the tris(alkoxide) ancillary ligand environment.

show abstract

Section: Resultsmentioning

confidence: 99%

Iron in a Trigonal Tris(alkoxide) Ligand Environment

et al. 2013

View full text Add to dashboard Cite

show abstract

“…This produced crystals of {[(Me 3 Si) 2 N] 2 (L)Y} 2 (μ-η 2 :η 2 -N 2 ) for L = benzonitrile (2), pyridine (3), 4-dimethylaminopyridine (4), and triphenylphosphine oxide (5) in yields of over 65% in Although trimethylamine N-oxide is most commonly used as a decarbonylation/decomplexation agent in organometallic chemistry or as an oxidant in organic synthesis, 42 when it acts only as a ligand, it is a strong donor. It has been shown to be a better donor than pyridine N-oxide 43,44 and displaces triphenylphosphine oxide in some cases. 45 The shorter Y−O bond length in 6 could be explained by a greater anionic contribution at oxygen due to the zwitterionic character of the Me 3 NO ligand.…”

Section: ■ Resultsmentioning

confidence: 99%

Varying the Lewis Base Coordination of the Y₂N₂ Core in the Reduced Dinitrogen Complexes {[(Me₃Si)₂N]₂(L)Y}₂(μ-η²:η²-N₂) (L = Benzonitrile, Pyridines, Triphenylphosphine Oxide, and Trimethylamine N-Oxide)

et al. 2012

View full text Add to dashboard Cite

The effect of the neutral donor ligand, L, on the Ln(2)N(2) core in the (N═N)(2-) complexes, [A(2)(L)Ln](2)(μ-η(2):η(2)-N(2)) (Ln = Sc, Y, lanthanide; A = monoanion; L = neutral ligand), is unknown since all of the crystallographically characterized examples were obtained with L = tetrahydrofuran (THF). To explore variation in L, displacement reactions between {[(Me(3)Si)(2)N](2)(THF)Y}(2)(μ-η(2):η(2)-N(2)), 1, and benzonitrile, pyridine (py), 4-dimethylaminopyridine (DMAP), triphenylphosphine oxide, and trimethylamine N-oxide were investigated. THF is displaced by all of these ligands to form {[(Me(3)Si)(2)N](2)(L)Y}(2)(μ-η(2):η(2)-N(2)) complexes (L = PhCN, 2; py, 3; DMAP, 4; Ph(3)PO, 5; Me(3)NO, 6) that were fully characterized by analytical, spectroscopic, density functional theory, and X-ray crystallographic methods. The crystal structures of the Y(2)N(2) cores in 2-5 are similar to that in 1 with N-N bond distances between 1.255(3) Å and 1.274(3) Å, but X-ray analysis of the N-N distance in 6 shows it to be shorter: 1.198(3) Å.

show abstract

“…14 The complexes of zinc and manganese reveal a lower nuclearity of diglyme complexes, [ 14 A propensity of Zn 2+ and Co 2+ to form four-and six-coordinate complexes 15 and their similar ionic radii (coordination number six: Zn 2+ 0.745 Å and Co 2+ 0.740 Å) 16 can result in similar molecular structures of ZnCl 2 and CoCl 2 complexes with some O-donor ligands. [17][18][19][20][21] We prepared cobalt chloride complexes with dme and diglyme to compare their synthesis conditions and structure to those of zinc chloride complexes with the same polyether ligands 14 and to elucidate influence of the ligands dme and diglyme to the nuclearity of cobalt chloride complexes.…”

Section: Introductionmentioning

confidence: 99%

Octahedral and Tetrahedral Cobalt(II) Sites in Cobalt Chloride Complexes with Polyethers

Petriček¹

2011

Croat. Chem. Acta

View full text Add to dashboard Cite

Abstract. A reaction of cobalt chloride hexahydrate with dimethoxyethane (dme) resulted in a dinuclear complex [CoCl 2 (dme)] 2 (1). The complex 1 reacted with di(2-methoxyethyl) ether (diglyme) in tetrahydrofuran (thf) solvent achieving polymeric [Co 2 Cl 4 (diglyme)] n (2). A reaction of cobalt chloride hexahydrate, diglyme and (CH 3 ) 3 SiCl in thf yielded the crystals of [Co 2 Cl 4 (diglyme)(thf)] (3). Both, tetrahedral and octahedral environments of cobalt ions were found in each of the complexes, 1, 2 and 3. Cobalt ions display a distorted octahedral geometry with bridging chlorides and terminal oxygen atoms from ether ligands and a distorted tetrahedral geometry with non-bridging and bridging chlorides. A four-and a sixcoordinate cobalt ion are linked by a double chloride bridge in the dinuclear complexes 1 and 3. Two tetrahedral or two octahedral cobalt ions in 2 are connected by double chloride bridges in dinuclear units which are linked to infinite chains by single chloride bridges. (doi: 10.5562/cca1747)

show abstract

Structures of dichlorobis(trimethylamine oxide)cobalt(II), diiodobis(trimethylamine oxide)cobalt(II), dichlorobis(trimethylamine oxide)zinc and dibromobis(trimethylamine oxide)zinc

Cited by 4 publications

References 12 publications

Iron in a Trigonal Tris(alkoxide) Ligand Environment

Iron in a Trigonal Tris(alkoxide) Ligand Environment

Varying the Lewis Base Coordination of the Y₂N₂ Core in the Reduced Dinitrogen Complexes {[(Me₃Si)₂N]₂(L)Y}₂(μ-η²:η²-N₂) (L = Benzonitrile, Pyridines, Triphenylphosphine Oxide, and Trimethylamine N-Oxide)

Octahedral and Tetrahedral Cobalt(II) Sites in Cobalt Chloride Complexes with Polyethers

Contact Info

Product

Resources

About

Structures of dichlorobis(trimethylamine oxide)cobalt(II), diiodobis(trimethylamine oxide)cobalt(II), dichlorobis(trimethylamine oxide)zinc and dibromobis(trimethylamine oxide)zinc

Cited by 4 publications

References 12 publications

Iron in a Trigonal Tris(alkoxide) Ligand Environment

Iron in a Trigonal Tris(alkoxide) Ligand Environment

Varying the Lewis Base Coordination of the Y2N2 Core in the Reduced Dinitrogen Complexes {[(Me3Si)2N]2(L)Y}2(μ-η2:η2-N2) (L = Benzonitrile, Pyridines, Triphenylphosphine Oxide, and Trimethylamine N-Oxide)

Octahedral and Tetrahedral Cobalt(II) Sites in Cobalt Chloride Complexes with Polyethers

Contact Info

Product

Resources

About

Varying the Lewis Base Coordination of the Y₂N₂ Core in the Reduced Dinitrogen Complexes {[(Me₃Si)₂N]₂(L)Y}₂(μ-η²:η²-N₂) (L = Benzonitrile, Pyridines, Triphenylphosphine Oxide, and Trimethylamine N-Oxide)