Metallchelate 1,1‐dialkylsubstituierter 3‐Thiobenzoylthioharnstoffe

Beyer, L.; Widera, R.; Hoyer, Eberhard

doi:10.1002/zfch.19810211119

Cited by 15 publications

(1 citation statement)

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“…The coordination chemistry of transition metals with N , N -dialkyl- N ′-acylthioureas ( 1 ; Chart ) has constantly been studied in the last decades. − Most of the structurally characterized compounds with these ligands are mononuclear complexes of nickel(II), palladium(II), platinum(II), or copper(II) with a cis square-planar coordination mode ( 2 ; Chart ), in which the ligands commonly act as bidentate, monoanionic chelators. − Facial coordination of the ligands is observed in mononuclear octahedral complexes with technetium(III) or cobalt(III) ( 3 ; Chart ). − …”

Section: Introductionmentioning

confidence: 99%

Trinuclear Co^IILn^IIICo^II Complexes (Ln = La, Ce, Nd, Sm, Gd, Dy, Er, and Yb) with 2,6-Dipicolinoylbis(N,N-diethylthiourea): Synthesis, Structures, and Magnetism

et al. 2019

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One-pot reactions of 2,6-dipicolinoylbis(N,N-diethylthiourea) (H2L) with Co(CH3COO)2·4H2O and LnCl3, where Ln = La, Ce, Nd, Sm, Gd, Dy, Er, and Yb, in warm methanol in the presence of Et3N, give stable trinuclear complexes of the composition [LnCo2(L)2(μ1,3-OOCCH3)2X] (“CoLnCo” complexes), where X– = κ2-CH3COO– or Cl–. X-ray structure determinations reveal symmetric trinuclear complexes containing two organic ligands (L2–), two terminal CoII ions, and one central LnIII ion. The organic ligands coordinate equatorially to the two CoII ions via two bidentate (O,S) N-acylthiourea moieties and tridentate to the central Ln ion via the (O,N,O) 2,6-dipicolinoyl moieties. Two acetate bridges established between each of the terminal Co and central Ln ions complete the square-pyramidal coordination spheres of CoII. All products possess an additional chlorido ligand axially coordinated to the lanthanide except the gadolinium(III) and lanthanum(III) complexes, where bidentate acetato ligands are coordinated. Fitting the χm T versus T data of the “CoLaCo” complex gives the axial and rhombic zero-field-splitting parameters D = 24.3(4) cm–1 and E = −1.0(2) cm–1, respectively, and anisotropic Landé values g x,y = 2.81(1) and g z = 2.00 as well as weak antiferromagnetic interactions between two high-spin CoII centers with J = −0.49(2) cm–1. The nature of the magnetic interactions between the LnIII ions and the CoII ions in the “CoLnCo” complexes is deduced by comparing their χM T values to the sum of χM T values of the analogous “CoLaCo” and related “ZnLnZn” complexes. The “CoDyCo” complex reveals an antiferromagnetic interaction, while the remaining “CoLnCo” complexes show ferromagnetic interactions.

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Section: Introductionmentioning

confidence: 99%

Trinuclear Co^IILn^IIICo^II Complexes (Ln = La, Ce, Nd, Sm, Gd, Dy, Er, and Yb) with 2,6-Dipicolinoylbis(N,N-diethylthiourea): Synthesis, Structures, and Magnetism

et al. 2019

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Symmetrische 3,3,3′,3′‐Tetraalkyl‐1,1′‐alkandioylbis(thioharnstoffe) als neue Chelatliganden

et al. 1987

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The synthesis of some new alkyl-alkanedioylbi$thioureas) (3-6) by reaction of dicarboxylic dichlorides with potassium thiocyanate and secondary amines is described. They act as bisbidentate S,O ligands toward bivalent metal ions which form stable neutral cheiates (7-10) extractable with apolar solvents like CHCl3 or tolueae. The chelates of palladium and platinum Alkyl-acylbis(thioharnstoffe) fanden bislang wenig Beachtung. Erst seit jiingerer Zeit liegen erste Ergebnisse iiber das Komplexierungsverhalten von 3,3,3 ',3 '-Tetraal k yl-1,1 '-terephthaloylbis- n Mz+ + n H2L tr M,L, + 2 n H + (n = 2,3) (1) Die Struktur eines Trinickelmacrocyclus von 3,3,3',3'-Tetraethyl-1,l'-terephthaloylbis(thioharnstoff) ist bereits rontgenstrukturanalytisch belegt ''I. Mit 3,3,3',

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N‐Acylthioharnstoffe – Selektive Liganden für die Komplexierung von Schwer‐ und Edelmetallen

1992

Nachr. Chem. Tech. Lab.

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Metallchelate 1,1‐dialkylsubstituierter 3‐Thiobenzoylthioharnstoffe

Cited by 15 publications

References 2 publications

Trinuclear Co^IILn^IIICo^II Complexes (Ln = La, Ce, Nd, Sm, Gd, Dy, Er, and Yb) with 2,6-Dipicolinoylbis(N,N-diethylthiourea): Synthesis, Structures, and Magnetism

Trinuclear Co^IILn^IIICo^II Complexes (Ln = La, Ce, Nd, Sm, Gd, Dy, Er, and Yb) with 2,6-Dipicolinoylbis(N,N-diethylthiourea): Synthesis, Structures, and Magnetism

Symmetrische 3,3,3′,3′‐Tetraalkyl‐1,1′‐alkandioylbis(thioharnstoffe) als neue Chelatliganden

N‐Acylthioharnstoffe – Selektive Liganden für die Komplexierung von Schwer‐ und Edelmetallen

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Metallchelate 1,1‐dialkylsubstituierter 3‐Thiobenzoylthioharnstoffe

Cited by 15 publications

References 2 publications

Trinuclear CoIILnIIICoII Complexes (Ln = La, Ce, Nd, Sm, Gd, Dy, Er, and Yb) with 2,6-Dipicolinoylbis(N,N-diethylthiourea): Synthesis, Structures, and Magnetism

Trinuclear CoIILnIIICoII Complexes (Ln = La, Ce, Nd, Sm, Gd, Dy, Er, and Yb) with 2,6-Dipicolinoylbis(N,N-diethylthiourea): Synthesis, Structures, and Magnetism

Symmetrische 3,3,3′,3′‐Tetraalkyl‐1,1′‐alkandioylbis(thioharnstoffe) als neue Chelatliganden

N‐Acylthioharnstoffe – Selektive Liganden für die Komplexierung von Schwer‐ und Edelmetallen

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Trinuclear Co^IILn^IIICo^II Complexes (Ln = La, Ce, Nd, Sm, Gd, Dy, Er, and Yb) with 2,6-Dipicolinoylbis(N,N-diethylthiourea): Synthesis, Structures, and Magnetism

Trinuclear Co^IILn^IIICo^II Complexes (Ln = La, Ce, Nd, Sm, Gd, Dy, Er, and Yb) with 2,6-Dipicolinoylbis(N,N-diethylthiourea): Synthesis, Structures, and Magnetism