Bridged bis(amidinate) lanthanide complexes: Synthesis, molecular structure and reactivity

Abstract The coordination compounds of the general formula Ln(HL)2(NO3)3, (where Ln = La - Eu (without Pm), HL = C6H5C(O)NHP(O)[N(CH3)2]2, N,Nʹ-tetramethyl-Nʺ-benzovlphosphoryl-triamide) have been synthesized and characterized by means of IR, UV-VIS, 1H, 31P NMR spectroscopy, and X-ray analysis. The complexes are isostructural according to X-ray powder diffraction studies. The crystal structure of the cerium(lll) complex has been determined. Crystal data: monoclinic, P21/c, with a = 10.503(9), b = 15.62(2), c = 21.91(2) Å, β = 99.56(8)°, Z = 4, V = 3546(6) Å3, R1= 0.0550, wR2 = 0.1383 for 6970 unique reflections used. The complex has a molecular structure. Neutral phosphoryltriamide ligands are coordinated to the metal ion in a bidentate manner via phosphoryl and carbonyl oxygen atoms with formation of six membered chelate rings. The coordination polyhedron of the Ce atom is a sphenocorona; C.N. = 10 (4 O[HL] + 6 O [NO3-]).

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Bimetallic lanthanide complexes with lanthanide-transition metal bonds. Molecular structure of (C4H8O)(C5H5)2LuRu(CO)2(C5H5). The use of 139La NMR spectroscopy

Journal of the American Chemical Society ◽

10.1021/ja00061a015 ◽

1993 ◽

Vol 115 (8) ◽

pp. 3156-3166 ◽

Cited By ~ 94

Author(s):

I. P. Beletskaya ◽

A. Z. Voskoboynikov ◽

E. B. Chuklanova ◽

N. I. Kirillova ◽

A. K. Shestakova ◽

...

Keyword(s):

Molecular Structure ◽

Nmr Spectroscopy ◽

Transition Metal ◽

Lanthanide Complexes ◽

Metal Bonds

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Crystal and molecular structure of sodium aqua(1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetato)europate(III) tetrahydrate Na+(EuDOTA.H2O)-.4H2O, and its relevance to NMR studies of the conformational behavior of the lanthanide complexes formed by the macrocyclic ligand DOTA

Inorganic Chemistry ◽

10.1021/ic00171a018 ◽

1984 ◽

Vol 23 (3) ◽

pp. 359-363 ◽

Cited By ~ 137

Author(s):

Marie Rose Spirlet ◽

Jean Rebizant ◽

Jean F. Desreux ◽

Marie France Loncin

Keyword(s):

Molecular Structure ◽

Lanthanide Complexes ◽

Crystal And Molecular Structure ◽

Macrocyclic Ligand ◽

Conformational Behavior ◽

Nmr Studies

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On Attempts to Synthesize Lanthanide Complexes of the Dianionic Fluorenyl-alkoxo Ligand [C13H8-cyclo-C6H10-O]2-. Crystal Structure of (C13H9-cyclo-C6H10-O)LaI2(DME)2

Zeitschrift für Naturforschung B ◽

10.1515/znb-2003-0506 ◽

2003 ◽

Vol 58 (5) ◽

pp. 389-394 ◽

Cited By ~ 2

Author(s):

Alexander A. Trifonov ◽

Mikhail N. Bochkarev ◽

Herbert Schumann ◽

Sebastian Dechert

Keyword(s):

Molecular Structure ◽

Crystal Structure ◽

Ir Spectra ◽

Single Crystal ◽

Lanthanide Complexes ◽

X Ray Diffraction ◽

X Ray ◽

H Nmr ◽

Elemental Analyses ◽

C Nmr

Racemic trans-2-(9(H)-fluoren-9-yl)cyclohexanol, C13H9-cyclo-C6H10-OH (1), reacts with two equivalents of potassium naphthalenide in THF to give the dipotassium salt [C13H8-cyclo-C6H10-O]- K2(THF) (2). Recrystallization of 2 from pyridine affords the solvent free salt [C13H8-cyclo-C6H10- O]K2 (3). The reactions of LaI3(THF)4 with one equivalent of 2 or of YbI2(THF)2 with equimolar amounts of 2 produce the alkoxolanthanum diiodide (C13H9-cyclo-C6H10-O)LaI2(DME)2 (4) and the ytterbium dialkoxide (C13H9-cyclo-C6H10-O)2Yb(THF)0.5(5), respectively. [(Me3Si)2N]3Y reacts with three equivalents of 1 with elimination of hexamethyldisilazane and formation of the yttrium trialkoxide (C13H9-cyclo-C6H10-O)3Y (6). The compounds 2 to 5 were characterized by elemental analyses, 1H NMR, 13C NMR and IR spectra. The molecular structure of 4 was determined by single crystal X-ray diffraction.

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