Benzylisopropyldithiocarbamate complexes of nickel with triphenylphosphine in the coordination sphere

Pastorek, Richard; Kamenı́ček, Jiřı́; Trávnı́ček, Zdeněk; Husárek, Josef; Duffy, Norman V.

doi:10.1016/s0277-5387(99)00188-6

Cited by 18 publications

(12 citation statements)

References 7 publications

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“…The ν C−S band appears around 960 cm −1 without any splitting, support the bidentate coordination of the dithiocarbamate moiety (16). The bands observed for the complexes 3 and 4 around 2100 and 860 cm −1 are connected with ν C≡N and ν C−S vibrations, which confirm the coordination of the NCS − group through the nitrogen atom (17).…”

Section: Spectroscopic Studiessupporting

confidence: 54%

Synthesis and spectral studies of Ni(II) heterocyclic dithiocarbamates with S₂PN chromophore: X-ray crystal structures of bis(1,2,3,4-tetrahydroquinolinecarbodithioato- S,S′)nickel(II) and 1,2,3,4-tetrahydroquinolinecarbodithioato-S,S′)(thiocyanato-N)(triphenylphosphine)nickel(II)

Valarmathi

Srinivasan

Thirumaran

2011

Journal of Sulfur Chemistry

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Ni(thqdtc) 2 ] (1), [Ni(thiqdtc) 2 ] (2), [Ni(thqdtc)(NCS)(PPh 3 )] (3) and [Ni(thiqdtc)(NCS)(PPh 3 )](4) (where thqdtc = 1, 2, 3, 4-tetrahydroquinolinedithiocarbamate and thiqdtc = 1, 2, 3, 4-tetrahydroisoquinolinedithiocarbamate) have been characterized by electronic, IR and NMR spectroscopy. The structures of 1 and 3 have been determined by single-crystal X-ray crystallography. The ν C−N (thioureide) is higher for 2 and 4 than for 1 and 3 and the upfield shift of the NCS 2 carbon signal for 4 in comparison to 3 is due to the electron-withdrawing resonance effect of the phenyl ring, thereby decreasing the double-bond character in the tetrahydroquinolinedithiocarbamate. On the other hand, the hyper-conjugative electron withdrawal of the benzyl group present in tetrahydroisoquinolinedithiocarbamate is comparatively less significant than its resonance effect. The N 13 CS 2 carbon signal for 3 is observed at 205.0 ppm with an upfield shift of about 3.7 ppm compared with that found in 1 (208.7 ppm). The observed shielding in 3 indicates the effect of PPh 3 on the mesomeric drift of electron density toward nickel through the thioureide C−N bond. Single-crystal X-ray analysis of 1 and 3 showed that the nickel is in a distorted square planar environment with the NiS 4 and NiS 2 PN chromophores, respectively. A significant asymmetry in the Ni−S bonds is observed in 3 [2.2068(5) and 2.1648(5) Å], whereas in compound 1 the bond distances are similar [2.1041(6) and 2.1968 (5) Å]. The observed difference in Ni−S distance in 3 is attributed to the difference in the trans-influencing properties of PPh 3 and NCS − .

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Section: Spectroscopic Studiessupporting

confidence: 54%

Synthesis and spectral studies of Ni(II) heterocyclic dithiocarbamates with S₂PN chromophore: X-ray crystal structures of bis(1,2,3,4-tetrahydroquinolinecarbodithioato- S,S′)nickel(II) and 1,2,3,4-tetrahydroquinolinecarbodithioato-S,S′)(thiocyanato-N)(triphenylphosphine)nickel(II)

Valarmathi

Srinivasan

Thirumaran

2011

Journal of Sulfur Chemistry

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“…32 The intense band appears at around 400 nm and is attributed to either metalligand or ligandmetal charge transfer transition. These two bands correspond to d xyd x 2 Ày 2 and d z 2d x 2 Ày 2 transitions, respectively.…”

Section: Spectroscopymentioning

confidence: 99%

“…The bands observed below 350 nm arise from intraligand p-p* charge transfer transition mainly associated with N-CQS and S-CQS groups. 32 The intense band appears at around 400 nm and is attributed to either metalligand or ligandmetal charge transfer transition.…”

Section: àmentioning

confidence: 99%

Nickel(ii) dithiocarbamate complexes containing the pyrrole moiety for sensing anions and synthesis of nickel sulfide and nickel oxide nanoparticles

2015

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6) have been prepared and characterized by elemental analysis, IR, 1 H, 13 C NMR, HSQC, HMBC and UV-Vis absorption spectra. For the heteroleptic complexes, the thiocyanide n C-N values were shifted to higher wavenumbers and NCS 2 carbon signals were shifted downfield compared to that of homoleptic complexes, suggesting the increased strength of the thioureide bond due to the presence of p-accepting phosphine. Electronic spectral studies suggest square-planar geometry for the complexes. Complex 5 was also characterized by X-ray diffraction techniques and presents a distorted NiS 2 PN square planar configuration around the Ni atom. Rare C-HÁ Á ÁNi intramolecular short contact interactions were observed in the complex 5.The ability of representative complexes 1 and 2 to sense anions (F À , Cl À , Br À and I À ) was examined by UV-Vis absorption spectra and cyclic voltametric titration studies. These studies show that both the complexes prefer to bind with I À . Complex 2 has been used as a single source precursor for the preparation of nickel sulfide and nickel oxide nanoparticles. The as-prepared nickel sulfide and nickel oxide nanoparticles have been characterized by PXRD, SEM, EDAX, TEM, HRTEM, UV-Vis and Photoluminescence spectroscopy. X-ray diffraction analysis showed the presence of three phases (cubic-NiS 2 , cubic-Ni 3 S 4 and rhombohedral-Ni 3 S 2 ). TEM images of nickel oxide revealed that the particles are spherical in shape with diameter B30 nm.

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“…Comparison of the information already available on similar compounds of this type leads to the conclusion that the coordination around the metal centres is probably square planar [9,16].…”

Section: Spectroscopic and Voltammetric Studiesmentioning

confidence: 97%

“…ligand or ligand ? metal charge transfer [16]. In addition to these charge transfer bands, the electronic spectrum of [Ni(dbpdtc) 2 ] shows weak bands at 457 and 619 nm.…”

Section: Spectroscopic and Voltammetric Studiesmentioning

confidence: 99%

Synthesis and spectral studies on NiS4, NiS2PN, NiS2P2 chromophores: Single-crystal X-ray structure of [Ni(dbpdtc)2] (dbpdtc = benzyl(4-(benzylamino)phenyl)dithiocarbamate)

Srinivasan

Valarmathi

Thirumaran

et al. 2010

Transition Met Chem

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Three complexes of a dithiocarbamate ligand (dbpdtc = benzyl(4-(benzylamino)phenyl)dithiocarbamate), namely [Ni(dbpdtc) 2 ] (1), [Ni(dbpdtc)(NCS)(PPh 3 )] (2) and [Ni(dbpdtc)(PPh 3 ) 2 ]ClO 4 (3) have been prepared. The complexes were characterized by IR, electronic spectroscopy and cyclic voltammetry. A single-crystal X-ray structural analysis was carried out for complex 1 and showed that the nickel is in a distorted square planar environment with a NiS 4 chromophore. For the two mixed ligand complexes, the thioureide m C-N values were shifted to higher wavenumbers compared to [Ni(dbpdtc) 2 ], suggesting increased strength of the thioureide bond due to the presence of the p-accepting phosphine. Electronic spectral studies suggest square planar geometries for the complexes. Cyclic voltammetry showed easier reduction of nickel(II) to nickel(I) in the mixed ligand complexes compared to [Ni(dbpdtc) 2 ].

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Benzylisopropyldithiocarbamate complexes of nickel with triphenylphosphine in the coordination sphere

Cited by 18 publications

References 7 publications

Synthesis and spectral studies of Ni(II) heterocyclic dithiocarbamates with S₂PN chromophore: X-ray crystal structures of bis(1,2,3,4-tetrahydroquinolinecarbodithioato- S,S′)nickel(II) and 1,2,3,4-tetrahydroquinolinecarbodithioato-S,S′)(thiocyanato-N)(triphenylphosphine)nickel(II)

Synthesis and spectral studies of Ni(II) heterocyclic dithiocarbamates with S₂PN chromophore: X-ray crystal structures of bis(1,2,3,4-tetrahydroquinolinecarbodithioato- S,S′)nickel(II) and 1,2,3,4-tetrahydroquinolinecarbodithioato-S,S′)(thiocyanato-N)(triphenylphosphine)nickel(II)

Nickel(ii) dithiocarbamate complexes containing the pyrrole moiety for sensing anions and synthesis of nickel sulfide and nickel oxide nanoparticles

Synthesis and spectral studies on NiS4, NiS2PN, NiS2P2 chromophores: Single-crystal X-ray structure of [Ni(dbpdtc)2] (dbpdtc = benzyl(4-(benzylamino)phenyl)dithiocarbamate)

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Benzylisopropyldithiocarbamate complexes of nickel with triphenylphosphine in the coordination sphere

Cited by 18 publications

References 7 publications

Synthesis and spectral studies of Ni(II) heterocyclic dithiocarbamates with S2PN chromophore: X-ray crystal structures of bis(1,2,3,4-tetrahydroquinolinecarbodithioato- S,S′)nickel(II) and 1,2,3,4-tetrahydroquinolinecarbodithioato-S,S′)(thiocyanato-N)(triphenylphosphine)nickel(II)

Synthesis and spectral studies of Ni(II) heterocyclic dithiocarbamates with S2PN chromophore: X-ray crystal structures of bis(1,2,3,4-tetrahydroquinolinecarbodithioato- S,S′)nickel(II) and 1,2,3,4-tetrahydroquinolinecarbodithioato-S,S′)(thiocyanato-N)(triphenylphosphine)nickel(II)

Nickel(ii) dithiocarbamate complexes containing the pyrrole moiety for sensing anions and synthesis of nickel sulfide and nickel oxide nanoparticles

Synthesis and spectral studies on NiS4, NiS2PN, NiS2P2 chromophores: Single-crystal X-ray structure of [Ni(dbpdtc)2] (dbpdtc = benzyl(4-(benzylamino)phenyl)dithiocarbamate)

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Synthesis and spectral studies of Ni(II) heterocyclic dithiocarbamates with S₂PN chromophore: X-ray crystal structures of bis(1,2,3,4-tetrahydroquinolinecarbodithioato- S,S′)nickel(II) and 1,2,3,4-tetrahydroquinolinecarbodithioato-S,S′)(thiocyanato-N)(triphenylphosphine)nickel(II)

Synthesis and spectral studies of Ni(II) heterocyclic dithiocarbamates with S₂PN chromophore: X-ray crystal structures of bis(1,2,3,4-tetrahydroquinolinecarbodithioato- S,S′)nickel(II) and 1,2,3,4-tetrahydroquinolinecarbodithioato-S,S′)(thiocyanato-N)(triphenylphosphine)nickel(II)