Cyclic voltammetric and infrared spectral studies on the interaction of Ni(II) dithiocarbamates with triphenylphosphine and the crystal and molecular structure of diethyldithiocarbamatobis(triphenylphosphine)nickel(II)perchlo-rate, [Ni(dedtc)(PPh3)2]ClO4

Ramalingam, K.; Aravamudan, G.; Seshasayee, M.

doi:10.1016/s0020-1693(00)86550-0

Cited by 43 publications

(12 citation statements)

References 18 publications

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“…The earlier cyclicvoltammetric study (from this laboratory) confirmed the ease of one electron addition to be the maximum for NiS 2 P 2 chromophore [7]. The presence of two phosphine groups in NiS 2 P 2 chromophore alleviates the electron density on the metal atom.…”

Section: Resultssupporting

confidence: 54%

“…Variation of alkyl substituents on the dithiocarbamates showed little effect on the Ni2p 3/2 binding energy values. An earlier cyclic voltammetric study from this laboratory confirmed the ease of one electron addition to be a maximum for NiS 2 P 2 chromophores [7] indicating the reduced electron density on nickel ion. In continuation of our interest in planar NiS 2 P 2 chromophores the present study was undertaken to compare the electron density on NiS 2 P 2 chromophores in free and chelated phosphine complexes.…”

Section: Introductionmentioning

confidence: 59%

“…Binding energy shifts of nickel 2p 3/2 electrons in different complexes with respect to the nickel atom are also given in Table 1. Cyclic voltammetric studies on NiS 4 , NiS 2 PCl and NiS 2 P 2 chromophores showed the presence of reduced electron density on nickel ion in NiS 2 P 2 chromophore compared to others [7]. This has been attributed to the presence of PPh 3 groups.…”

Section: Resultsmentioning

confidence: 87%

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X-Ray Photoelectron Spectral Studies on Planar NiS4 and NiS2P2 Chromophores. Single Crystal X-Ray Structural Study on [1, 4-Bis(diphenylphosphino-k, P, P')butane](piperidinecarbodithioato-S, S')-Nickel(II) Perchlorate

Thiruneelakandan

Ramalingam

Manohar

et al. 2002

Z. anorg. allg. Chem.

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X-ray photoelectron spectral study was made on the complexes Ni(nmedtc) 2 (1), [Ni(nmedtc)(PPh 3 ) 2 ]ClO 4 (2), [Ni-(nmedtc)(dppe)]BPh 4 (3) (where nmedtc ϭ N-methyl,N-ethanoldithiocarbamate, dppe ϭ 1,2-bis(diphenylphosphino)ethane). The nickel 2p 3/2 binding energy values for chelated and free phosphine complexes are 854.0 and 854.1 eV which are significantly different from Ni2p 3/2 BE value of NiS 4 chromophore, indicating the relative dearth of electron density on Ni in NiS 2 P 2 chromophores. The presence of two phosphine groups in NiS 2 P 2 chromophore alleviates the electron density on the metal atom. More electron density is being pulled away from the metal atom in chelates than in the PPh 3 Röntgen-Photoelektronenspektroskopie an planeren NiS 4 -und NiS 2 P 2 -Chromophoren und eine Einkristall-Röntgenstrukturanalyse von [1,4-Bis(diphenylphosphino-k,P,P')butan](piperidincarbodithioato-S,S')-nickel(II) PerchloratInhaltsübersicht. Röntgen-Photoelektronenspektren wurden von den Komplexen Ni(nmedtc) 2 (1), [Ni(nmedtc)(PPh 3 ) 2 ]ClO 4 (2) und [Ni(nmedtc)(dppe)]BPh 4 (3) (nmedtc ϭ N-methyl,N-ethanoldithiocarbamate, dppe ϭ 1,2-bis(diphenylphosphino)ethane) aufgenommen. Die Werte für die Ni 2p 3/2 -Bindungsenergie für die chelatisierten und freien Phosphankomplexe betragen 854,0 und 854,1 eV und sind deutlich verschieden vom Ni 2p 3/2 -Wert des NiS 4 -Chromophors, was den relativen Mangel der Elektronendichte am Ni in den NiS 2 P 2 -Chromophoren anzeigt. Die Präsenz von zwei Phosphangruppen im NiS 2 P 2 vermindert die Elektronendichte am

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Section: Resultssupporting

confidence: 54%

Section: Introductionmentioning

confidence: 59%

Section: Resultsmentioning

confidence: 87%

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X-Ray Photoelectron Spectral Studies on Planar NiS4 and NiS2P2 Chromophores. Single Crystal X-Ray Structural Study on [1, 4-Bis(diphenylphosphino-k, P, P')butane](piperidinecarbodithioato-S, S')-Nickel(II) Perchlorate

Thiruneelakandan

Ramalingam

Manohar

et al. 2002

Z. anorg. allg. Chem.

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“…The electronic absorption spectrum of complex 1 shows bands at 440 and 560 nm, respectively. The band which appear at 440 nm is attributed to either metal ® ligand (or) ligand ® metal charge transfer process [13]. The band at 560 nm is due to d-d transition.…”

Section: Resultsmentioning

confidence: 94%

“…On reaction with PR 3 or dppe, they form complexes with chromophore NiS 2 P 2 which are diamagnetic in nature [9±11]. Mixed complexes of the type [Ni(S 2 CNR 2 )X(PR 3 ± ) have also been reported from our laboratory [13]. Recently, single crystal structural studies of the following complexes [Ni(dipdtc)-(PPh 3 anion; pipdtc ± = piperidinedithiocarbamate anion, and nmedtc ± = N-methyl, N-ethanoldithiocarbmate anion).…”

Section: Introductionmentioning

confidence: 93%

Steric and Electronic Effects of Chelating Phosphines: Synthesis, Spectral, and Single Crystal X-Ray Structural Studies on [1,3-Bis(diphenylphosphino-k,P,P′)propane](diisopropyldithiocarbamato)nickel(II) Perchlorate and [1,3-Bis(diphenylphosphino-k,P,P′)propane](piperidinecarbodithioato)nickel(II) Perchlorate

Manohar

Ramalingam

Thiruneelakandan

et al. 2001

Z. anorg. allg. Chem.

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Steric and Electronic Effects of Chelating Phosphines: Synthesis, Spectral, and Single Crystal X-Ray Structural Studies on [1,3-Bis(diphenylphosphino-k,P,P')propane](diisopropyldithiocarbamato)-nickel(II) Perchlorate and [1,3-Bis(diphenylphosphino-k,P,P')propane]-(piperidinecarbodithioato)nickel(II) PerchlorateAbstract. The complexes [Ni(dipdtc)(1,3-dppp)]ClO 4 (1) and [Ni(pipdtc)(1,3-dppp)]ClO 4 (2) (dipdtc ± = diisopropyldithiocarbamate anion, pipdtc ± = piperidinecarbodithioato anion, 1,3-dppp = 1,3-bis(diphenylphosphino)propane) have been prepared from the parent dithiocarbamato complexes with 1,3-dppp in CH 3 CN±CH 3 OH and characterized by electronic and IR spectra and their structures are determined by X-ray crystallography. The crystal structures of the complexes have planar NiS 2 P 2 chromophores. The complexes 1 and 2 are asymmetric with respect to their Ni±S and Ni±P distances.The P±Ni±P angles in both complexes, are larger than those observed in the diphenylphosphino ethane analogues. Thioureide mC±N bands occur at 1512 and 1536 cm ±1 for compounds 1 and 2 respectively. The increased mC±N value is due to flow of electron density from nitrogen towards the metal ion. Electronic spectra show the signature bands at 460 for 1 and 450 nm for 2.Sterische und elektronische Effekte chelatisierender Phosphine: Synthese, spektroskopische und Einkristallstruktur-Untersuchungen an [1,3-Bis(diphenylphosphino-k,P,P')propan](diisopropyldithiocarbamat)-nickel(II)-Perchlorat und [1,3-Bis(diphenylphosphino-k,P,P')propan]-(piperidincarbodithioato)nickel(II)-Perchlorat Inhaltsu È bersicht. Die Komplexe [Ni(dipdtc)(1,3-dppp)]ClO 4 (1) und [Ni(pipdtc)(1,3-dppp)]ClO 4 (2) (dipdtc ± = Diisopropyldithiocarbamat-Anion, pipdtc ± = PiperidincarbodithioatoAnion, 1,3-dppp = 1,3-Bis(diphenylphosphino)propan) wurden aus den Bis(dithiocarbamat)-Komplexen mit 1,3-Dppp in CH 3 CN±CH 3 OH synthetisiert und durch ihre elektronischen und IR-Spektren sowie durch Kristallstrukturanalysen charakterisiert. Die Komplexe enthalten planare NiS 2 P 2 -Chromophore und sind hinsichtlich ihrer Ni±S-und Ni±P-Absta È nde asymmetrisch. In beiden Komplexen sind die P±Ni±P-Winkel gro È ûer als in den Diphenylphosphino-EthanAnalogen. Die Thioureid-mC±N-Banden liegen bei 1512 (1) bzw. 1536 cm ±1 (2). Die kurzwellige Verschiebung der Banden im Vergleich mit den Spektren der Ausgangskomplexe entspricht einem Elektronenfluû vom N-Atom zum Metallion. Die Elektronenspektren zeigen charakteristische Banden bei 460 (1) und 450 nm (2).

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Organometallic Nickel(II) Complexes Containing Thiolate and Dithiocarbamate Ligands

Sánchez

Ruiz

Serrano

et al. 2000

Eur. J. Inorg. Chem.

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The mono(pentafluorophenyl)nickel(II) complexes [Ni(C6F5)ClL2] (L = PPhMe2, PPh2Me; L2 = dppe) react with KSR (R = Ph, C6H4Me‐p, C6H4OMe‐p, C6H4Cl‐p, C6H3Cl2‐2,6, C6H4NO2‐p) at room temperature in acetone/dichloromethane to give the mononuclear thiolate complexes [Ni(C6F5)(SR)L2]. The binuclear μ‐thiolate complex [{Ni(C6F5)(PPhMe2)}2(μ‐SC6H4NO2‐p)2] is obtained by reaction of KSC6H4NO2‐p with the same chloro complex in refluxing dichloromethane. A single‐crystal X‐ray diffraction study of [Ni(C6F5)(SC6H4NO2‐p)(PPhMe2)2] and [{Ni2(C6F5)2(PPhMe2)2(μ‐SC6H4NO2‐p)2] has established the mononuclear and binuclear nature of the complexes. The dithiocarbamatenickel complexes [Ni(C6F5)(S2CNR2)L] (L = PPhMe2, PPh2Me, PEt3; R = Et, iPr; R2 = C5H10, C4H8O) have been prepared by reaction of [Ni(C6F5)ClL2] (L = PPhMe2, PPh2Me, PEt3) with the alkali metal salt of the corresponding dithioacid. A single‐crystal X‐ray diffraction study of [Ni(C6F5)(S2CNiPr2)(PPhMe2)] has established the mononuclear nature of the complex, and the geometry around each Ni atom as that of a tetrahedrally distorted square‐planar geometry. Analytical (C, H, N), spectroscopic (IR, 1H, and 19F NMR), and mass spectrometry (FAB) data have been used for structural assignments.

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Cyclic voltammetric and infrared spectral studies on the interaction of Ni(II) dithiocarbamates with triphenylphosphine and the crystal and molecular structure of diethyldithiocarbamatobis(triphenylphosphine)nickel(II)perchlo-rate, [Ni(dedtc)(PPh3)2]ClO4

Cited by 43 publications

References 18 publications

X-Ray Photoelectron Spectral Studies on Planar NiS4 and NiS2P2 Chromophores. Single Crystal X-Ray Structural Study on [1, 4-Bis(diphenylphosphino-k, P, P')butane](piperidinecarbodithioato-S, S')-Nickel(II) Perchlorate

X-Ray Photoelectron Spectral Studies on Planar NiS4 and NiS2P2 Chromophores. Single Crystal X-Ray Structural Study on [1, 4-Bis(diphenylphosphino-k, P, P')butane](piperidinecarbodithioato-S, S')-Nickel(II) Perchlorate

Organometallic Nickel(II) Complexes Containing Thiolate and Dithiocarbamate Ligands

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