Structures of [CoCl(C18H15P)3] and [NiCl(C18H15P)3].C7H8

Cassidy, Juanita; Whitmire, K.H.

doi:10.1107/s0108270191005498

Cited by 21 publications

(43 citation statements)

References 6 publications

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“…The NiOP bond (2.159 Å) was identical to the distance (2.160 Å) for 7 23 but was shorter than the distances 2.31 and 2.30 Å for NiCl 2 (PPh 3 ) 2 24 and NiCl(PPh 3 ) 3 , respectively. 27 The average NiOC length was 2.14 Å, which was nearly equal to the average bond distances (2.13-2.15 Å) for Ni(C 5 H 5 ) 4 H 3 , 28 Ni(C 5 H 5 ) 4 H 4 , 29 and (C 5 Me 5 )Ni(PEt 3 )(OTol). 30 The Cp(centroid)ONiO Cl and Cp(centroid)ONiOP angles were 127.5 and 140.0°, respectively.…”

Section: Polymerization Of Mma With Half-metallocene Complexesmentioning

confidence: 73%

“…An X-ray analysis of the structural isomer (triclinic) for 9 (trigonal) was already reported, and each bond distance and bond angle were nearly identical. 27 Recently, living radical polymerizations of MMA and styrene were reported with various HIGH POLYMERIZATION OF METHYL METHACRYLATE types of metal complexes, including Cu, [31][32][33] Fe, 34 Ru, [35][36][37][38]40 derivatives. To penetrate the polymerization mechanism, we performed random copolymerizations of MMA with styrene in a 1/1 ratio with complexes 5 and 8 coupled with MMAO.…”

Section: Polymerization Of Mma With Half-metallocene Complexesmentioning

confidence: 99%

See 1 more Smart Citation

High polymerization of methyl methacrylate with organonickel/MMAO systems

Ihara¹,

Fujimura²,

Yasuda³

et al. 2000

J. Polym. Sci. A Polym. Chem.

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Section: Polymerization Of Mma With Half-metallocene Complexesmentioning

confidence: 73%

Section: Polymerization Of Mma With Half-metallocene Complexesmentioning

confidence: 99%

High polymerization of methyl methacrylate with organonickel/MMAO systems

Ihara¹,

Fujimura²,

Yasuda³

et al. 2000

J. Polym. Sci. A Polym. Chem.

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“…3) 32,47 wherein the lack of steric strain results in a more ideal tetrahedral geometry (Cl-Co-P avg = 114°) 12 versus the distorted geometry of 1 (I-Co-P avg = 124.2°). Exposure of a solution of 1 in THF to oxygen leads to a rapid change in color from orange to pale blue, indicating formation of a Co II species (vide infra, EPR section), similar to a report of the reaction of [(PPh 3 ) 3 Co(Cl)] in air.…”

Section: Uv/vis/nir Absorption Spectrummentioning

confidence: 99%

Spectroscopic and magnetic properties of an iodo CoI tripodal phosphine complex

et al. 2012

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Reaction of the tripodal phosphine ligand 1,1,1-tris((diphenylphosphino)phenyl)ethane (PhP3) with CoI 2 spontaneously generates a one-electron reduced complex, [(PhP3)Co I (I)] (1). The crystal structure of 1 reveals a distorted tetrahedral environment, with an apical Co-I bond distance of ∼2.52 Å. Co II/I redox occurs at an unusually high potential (+0.38 V vs. SCE). The electronic absorption spectrum of 1 exhibits an MLCT peak at 320 nm (ε = 8790 M . DFT calculations also support a spin-triplet ground state for 1, as optimized (6-31G*/PW91) geometries (S = 1) closely match the X-ray structure. EPR measurements performed in parallel mode (X-band; 0-15 000 G, 15 K) on polycrystalline 1 or frozen solutions of 1 (THF/toluene) exhibit a feature at g ≈ 4 that arises from a (Δm = 2) transition within the M S = <+1,−1> manifold. Below 10 K, the EPR signal decreases significantly, consistent with a solution zfs parameter (|D| ≈ 8 cm −1 ) similar to that obtained from SQUID measurements. Our work provides an EPR signature for high-spin Co I in trigonal ligation.

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“…While the fate of all of the solution species is not yet known, the reduction of metal centers with ethanol to form acetaldehyde is well established. 4 In this discussion, we now report the unusual synthesis and crystal structure of the title complex, and compare the tris(1,10-phenanthroline)iron(II) cation to the many tris(1,10-phenanthroline)iron(II) cations already reported.The synthesis of the title complex included analytical grade reagents. 2,6-Pyridinedicarboxylic acid (0.17 g, 1 mmol) in ethanol (50 cm 3 ) was added dropwise into a stirred solution of iron(III) perchlorate hexahydrate (0.35 g, 1 mmol) in ethanol (50 cm 3 ) in a 250 cm 3 conical flask over a 30 min period at 60 C. The resulting mixture was stirred for an additional hour after the complete addition of 2,6-pyridinedicarboxylic acid.…”

mentioning

confidence: 93%

mentioning

confidence: 93%

Synthesis and Crystal Structure of Tris(1,10-phenanthroline)iron(II) perchlorate ethanol monosolvate hemihydrate

2007

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For many years, 1,10-phenanthroline has been used as a ligand in the detection and quantification of iron via UV/visible spectrophotometry. The main species in the quantification of iron is the [Fe(phen)3] 2+ cation, which absorbs at 510 nm. 1,2 Our laboratory has been interested in the synthesis of mixed-ligand complexes with 2,6-pyridinedicarboxylic acid (dipicolinic acid, H2dipic) in the interest of making supramolecular complexes. We decided to repeat the synthesis of the mixed ligand complexes as reported by Samnani et al.,3 where they claimed to have synthesised [Fe(dipic)(phen)] n+ , but that species was not structurally characterized. We, instead serendipitously isolated the title complex, tris(1,10-phenanthroline)iron(II) perchlorate ethanol monosolvate hemihydrate, from a reaction mixture consisting of dipicolinic acid, 1,10-phenanthroline, and iron(III) perchlorate hexahydrate. While the fate of all of the solution species is not yet known, the reduction of metal centers with ethanol to form acetaldehyde is well established. 4 In this discussion, we now report the unusual synthesis and crystal structure of the title complex, and compare the tris(1,10-phenanthroline)iron(II) cation to the many tris(1,10-phenanthroline)iron(II) cations already reported.The synthesis of the title complex included analytical grade reagents. 2,6-Pyridinedicarboxylic acid (0.17 g, 1 mmol) in ethanol (50 cm 3 ) was added dropwise into a stirred solution of iron(III) perchlorate hexahydrate (0.35 g, 1 mmol) in ethanol (50 cm 3 ) in a 250 cm 3 conical flask over a 30 min period at 60 C. The resulting mixture was stirred for an additional hour after the complete addition of 2,6-pyridinedicarboxylic acid. A solution of 1,10-phenanthroline (0.18 g, 1 mmol) in ethanol (50 cm 3 ) was added dropwise into the above solution, which was then stirred for three hours. The title complex was serendipitously obtained by reacting dipicolinic acid, 1,10-phenanthroline, and iron(III) perchlorate hexahydrate in ethanol. Single crystals were grown by allowing the sealed reaction mixture to stand for two weeks, thus yielding the increasingly structurally characterized tris(1,10-phenanthroline)iron(II) cation.

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Structures of [CoCl(C18H15P)3] and [NiCl(C18H15P)3].C7H8

Cited by 21 publications

References 6 publications

High polymerization of methyl methacrylate with organonickel/MMAO systems

High polymerization of methyl methacrylate with organonickel/MMAO systems

Spectroscopic and magnetic properties of an iodo CoI tripodal phosphine complex

Synthesis and Crystal Structure of Tris(1,10-phenanthroline)iron(II) perchlorate ethanol monosolvate hemihydrate

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