Coordination compounds of Cd(II) with several bidentate-NN′ and tridentate-NN′N nitrogen donor ligands. 113Cd NMR studies of monomeric compounds containing nitrogen donor atoms

Pons, Josefina; García‐Antón, Jordi; Font-Bardı́a, Mercè; Calvet, Teresa; Ros, Josep

doi:10.1016/j.ica.2008.12.009

Cited by 32 publications

(19 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For the molar ratio CH 2 L/CCd(II) = 2, the 113 1 H and 113 Cd NMR experiments at variable temperature for 3 and 4 show that dynamic processes are taking place in solution 113 Cd NMR chemical shift data for complexes 1-4 in solution were also reported. 154 It was shown that the 113 Cd NMR chemical shifts observed for CdII in the designed TRI series (TRI = Ac-G-(LKALEEK) 4 G-NH 2 ) of peptides vary depending on the proportion of trigonal planar CdS 3 and pseudotetrahedral CdS 3 O species present in the equilibrium mixture. PAC spectra are able to quantify these mixtures.…”

Section: Barium ( 137 Ba) (I = 3/2) the Local Ba Environment In B-bamentioning

confidence: 99%

Applications of nuclear shielding

Kuroki¹,

Matsukawa²,

Yasunaga³

2011

Nuclear Magnetic Resonance

View full text Add to dashboard Cite

Section: Barium ( 137 Ba) (I = 3/2) the Local Ba Environment In B-bamentioning

confidence: 99%

Applications of nuclear shielding

Kuroki¹,

Matsukawa²,

Yasunaga³

2011

Nuclear Magnetic Resonance

View full text Add to dashboard Cite

“…Metal complexes with N ‐alkylaminopyrazole ligands, including Rh(I), Ru(II), Pd(II), Pt(II), Zn(II), and Co(II) complexes, have exhibited a variety of potentially useful chemical properties . Although there have been many reports describing transition metal complexes ligated to chelating pyrazolyl ligands, some recent studies have documented the use of transition metals, specifically cadmium, catalysts for olefin polymerization and methyl methacrylate (MMA) polymerization . Previously, we described Co(II), Zn(II) and Pd(II) complexes with N , N ‐bis(1 H ‐pyrazolyl‐1‐methyl)aniline and their derivatives in MMA polymerizations …”

Section: Introductionmentioning

confidence: 99%

X‐ray crystal structures and MMA polymerization of cadmium(II) complexes with bidentate pyrazole ligands: the formation of monomers or dimers as a function of a methyl substituent on the pyrazole and aniline rings

Kim

Woo

et al. 2014

Applied Organom Chemis

View full text Add to dashboard Cite

The reaction of CdBr 2 ·4H 2 O with ancillary ligands, N,N-bis(1H-pyrazolyl-1-methyl)aniline (L 1 ), N,N-bis(1H-pyrazolyl-1-methyl)-pmethylaniline (L 2 ), N,N-bis(1H-pyrazolyl-1-methyl)-3,5-dimethylaniline (L 3 ), N,N-bis(3,5-dimethyl-1H-pyrazolyl-1-methyl)aniline (L 4 ) and N,N-bis(1H-pyrazolyl-1-methyl)-2,6-dimethylaniline (L 5 ) in ethanol yields novel Cd(II) bromide a bromo-bridged dimeric species with crystallographic inversion symmetry. Conversely, [L 4 CdBr 2 ] and [L 5 CdBr 2 ] exist as monomeric complexes, presumably due to the steric hindrance between the methyl substituents of the two pyrazole groups in the ligand and cadmium centre for [L 4 CdBr 2 ], and crowding around the cadmium metal by methyl substituents on the aniline residue in the ligand for [L 5 CdBr 2 ]. The geometry at each Cd(II) centre for [L 1 CdBr 2 ] 2 , [L 2 CdBr 2 ] 2 and [L 3 CdBr 2 ] 2 is best described as a distorted trigonal bipyramid. A distorted trigonal bipyramid is achieved in [L 4 CdBr 2 ] by coordinative interaction of the nitrogen atom of the aniline unit and the cadmium atom with a σ plane of symmetry, based on the bond length of Cd-N aniline (2.759(7) Å). [L 5 CdBr 2 ] exists with a distorted tetrahedral geometry involving non-coordination of the nitrogen atom of aniline and the Cd centre, resulting in the formation of an eight-membered chelate ring. The catalytic activity of monomeric, five-coordinated [L 4 CdBr 2 ] in the polymerization of methyl methacrylate (MMA) in the presence of modified methylaluminoxane (MMAO) at 60°C resulted in a higher molecular weight and a narrower polydispersity index (PDI) than those obtained with dimeric [L n CdBr 2 ] 2 (L n = L 1 , L 2 , L 3 ) or monomeric tetrahedral [L 5 CdBr 2 ].

show abstract

“…The syntheses of these ligands and the studies of their reactivity with Ni(II), Co(II), Zn(II) and Cu(II) were carried out by Driessen et al and Sheu et al [5][6][7][8][9][10]. Other studies of the reactivity of theses ligands are reported by Calderazzo et al using Fe(II) [11] and Carpentier et al using Al(III) and Zn(II) [12] as coordination metals.More recently, the syntheses of new types of N-alkylaminopyrazole ligands and the evaluation of their reactivitywith Rh(I) [13][14][15][16], Pd(II) [17][18][19][20], Pt(II) [21], Zn(II) [22] and Cd(II) [23] have been continued by our group. Some of them have been used in the synthesis and stabilization of nanoparticles, even as metal recognizer molecules in metal sensing systems [24][25][26].…”

Section: Introductionmentioning

confidence: 99%