Palladium(II) complexes obtained from 3,4-bis(cyanamido)cyclobutane-1,2-dione dianion

Cortadellas, Olivier; Galibert, Anne Marie; Soula, Brigitte; Donnadieu, Bruno; Fabre, Paul-Louis

doi:10.1016/j.ica.2003.07.004

Cited by 9 publications

(9 citation statements)

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“…In the spectra for 1-4, one may notice the absence of the carbonyl stretching vibration between 1700 and 1800 cm À1 previously observed in derivatives of 3,4-NCNsq 2À [8][9][10]. This may be attributed to the presence of an inversion centre in the middle of the squarate ring in compounds 1-4.…”

Section: Ir Spectroscopymentioning

confidence: 61%

“…In our previous works [8][9][10], we have studied the conformations of the 3,4-NCNsq 2À ligand: two conformers (C 2v and C s symmetries) have been structurally evidenced in complexes. In this work, concerning the 2,4-NCNsq 2À dianion, the same conformer A (C 2h symmetry) is always observed in the molecular structures of the three nickel(II) polymers.…”

Section: Resultsmentioning

confidence: 99%

“…In the course of our studies on this class of compounds [6][7][8][9][10], we have focused our attention on cyanamido squa-rate derivatives as the 3,4-bis(cyanamido)cyclobutane-1,2dione dianion (3, ) and the 2,4-bis(cyanamido)cyclobutane-1,3-dione dianion (2, ). of DCNQI (dicyanoquinonediimine) may be proposed [11,12] because they show the same delocalized trans structure.…”

Section: Introductionmentioning

confidence: 99%

“…We have previously reported on copper(I), copper(II) [8], nickel(II) [9] and Pd(II) [10] complexes with the 3,4-NCNsq 2À ligand. In these complexes, the dianion occurs as a monodentate or bis-monodentate ligand, bonding via either the nitrile function or the amido nitrogen atom.…”

Section: Introductionmentioning

confidence: 99%

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Nickel coordination compounds of the cyanamido squarate ligand. The crystal structures of the 2,4-bis(cyanamido)cyclobutane-1,3-dione dianion (2,4-NCNsq2−) and of three polymers with general formula [Ni(Him)x(H2O)4−x(2,4-NCNsq)·yH2O]n (x=2–4; y=1–3; Him=imidazole)

Cortadellas¹,

Galibert²,

Soula³

et al. 2006

Inorganica Chimica Acta

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OATAO is an open access repository that collects the work of Toulouse researchers and makes it freely available over the web where possible. This is an author-deposited version published in: http://oatao.univ-toulouse.fr/ Eprints ID : 2545To link to this article : URL : http://dx.Nickel coordination compounds of the cyanamido squarate ligand. The crystal structures of the 2,4-bis(cyanamido)cyclobutane-1,3-dione dianion (2,4-NCNsq 2À ) and of three polymers with generalDisodium and ditetraphenylphosphonium salts of 2,4-bis(cyanamido)cyclobutane-1,3-dione, Na 2 (2,4-NCNsq) AE 2H 2 O (1) and (Ph 4 P) 2 (2,4-NCNsq) AE 4H 2 O (2) have been synthesized and used to prepare three nickel(II) complexes: [Ni(Him) 4 (2,4-NCNsq) AE 2H 2 O] n (3), [Ni(Him) 3 (H 2 O)(2,4-NCNsq) AE H 2 O] n (4) and [Ni(Him) 2 (H 2 O) 2 (2,4-NCNsq) AE 3H 2 O] n (5). Compounds 1-5 have been synthesized and characterized by electronic absorption and IR spectroscopies and by electrochemical studies. The structures of the salt 2 and of the complexes 3-5 have been determined by X-ray crystallography. The dianion of 2 presents a centro-symmetric square planar structure with two NCN functions deviated from the ring plane by an angle of 20.6°. Complexes 3-5 are polynuclear nickel(II) compounds containing 2,4-NCNsq 2À bridging ligands. These ligands are coordinated by the nitrile nitrogen atoms of the cyanamido functions and lie in cis (complex 4) or trans (complexes 3 and 5) positions in the coordination sphere of the nickel(II). The magnetic properties of the three complexes have been investigated in the 2-300 K temperature range (l eff = 2.79-3.34 l B for 3, 2.76-3.25 l B for 4 and 3.14-3.46 l B for 5). Their redox properties are discussed and compared to those of the free 2,4-NCNsq 2À dianion.

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Section: Ir Spectroscopymentioning

confidence: 61%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Nickel coordination compounds of the cyanamido squarate ligand. The crystal structures of the 2,4-bis(cyanamido)cyclobutane-1,3-dione dianion (2,4-NCNsq2−) and of three polymers with general formula [Ni(Him)x(H2O)4−x(2,4-NCNsq)·yH2O]n (x=2–4; y=1–3; Him=imidazole)

Cortadellas¹,

Galibert²,

Soula³

et al. 2006

Inorganica Chimica Acta

Self Cite

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“…that of 2.8866(15) Å observed in the only dinuclear palladium(II) complex with two metal centres connected by four (N-C-C-N) bridges, i.e. in K 3 Na[Pd 2 (3,4-diNCNsq) 4 ]·4.5H 2 O [3,4-diNCNsq = 3,4-bis(cyanamido)squarate] [14]. However, on the basis of the literature research, it can be claimed that there is no direct chemical bond between the two metal centres of 1b.…”

Section: Inorganic Chemistry Communications J O U R N a L H O M E P Amentioning

confidence: 99%

X-ray structure and properties of a dinuclear palladium(II) complex [Pd2(μ-L)4] with four adenine-based bridges in a paddle wheel-like arrangement

Štarha

Novotná

Trávníček

2010

Inorganic Chemistry Communications

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Tetrakis [N-(2-pyridyl) sulfonamide] di palladium: synthesize, X-ray diffraction, antibacterial properties and as a novel binuclear Pd-complex for coupling reactions

et al. 2017

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Palladium(II) complexes obtained from 3,4-bis(cyanamido)cyclobutane-1,2-dione dianion

Cited by 9 publications

References 43 publications

Nickel coordination compounds of the cyanamido squarate ligand. The crystal structures of the 2,4-bis(cyanamido)cyclobutane-1,3-dione dianion (2,4-NCNsq2−) and of three polymers with general formula [Ni(Him)x(H2O)4−x(2,4-NCNsq)·yH2O]n (x=2–4; y=1–3; Him=imidazole)

Nickel coordination compounds of the cyanamido squarate ligand. The crystal structures of the 2,4-bis(cyanamido)cyclobutane-1,3-dione dianion (2,4-NCNsq2−) and of three polymers with general formula [Ni(Him)x(H2O)4−x(2,4-NCNsq)·yH2O]n (x=2–4; y=1–3; Him=imidazole)

X-ray structure and properties of a dinuclear palladium(II) complex [Pd2(μ-L)4] with four adenine-based bridges in a paddle wheel-like arrangement

Tetrakis [N-(2-pyridyl) sulfonamide] di palladium: synthesize, X-ray diffraction, antibacterial properties and as a novel binuclear Pd-complex for coupling reactions

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