TY - JOUR
T1 - Organoamido- and aryloxo-lanthanoids. XIII
T2 - Organometallic compounds of the lanthanoids. CV - New lanthanoid(III) complexes with pyrazolate ligands
AU - Cosgriff, Joanna E.
AU - Deacon, Glen B.
AU - Gatehouse, Bryan M.
AU - Schumann, Herbert
PY - 1996
Y1 - 1996
N2 - The complexes Er(Me2pz)3(thf) and Ln(Ph2pz)3(thf)n (Ln = Sc, Y, Gd, Er, n = 2; Ln = Lu, n = 3) (Me2pz- = 3,5-dimethylpyrazolate, thf = tetrahydrofuran, Ph2pz- = 3,5-diphenylpyrazolate) have been prepared by reaction of the lanthanoid metal with bis(pentafluorophenyl)mercury and the pyrazole in thf. The Ln(Ph2pz)3(thf)2 complexes are considered to be eight coordinate with three η2-Ph2pz ligands. Other lanthanoid pyrazolate complexes, Y(pz)3(thf)2, La(Me2pz)3(thf), Cp2Ln(Me2pz)(thf)n (Ln = Y, Lu, n = 0; Ln = Lu, n = 1), (C5Me5)2Y(pz)(thf), (C5Me5)2Y(Mepz)(thf), (C5Me5)2Y(Me2pz)-(thf)2 (pz- = pyrazolate, Mepz- = 3-methylpyrazolate, Cp = cyclopentadienyl) have been synthesized by reaction of LnCl3, Cp2LnCl, or (C5Me5)2LnCl with the appropriate sodium pyrazolate in thf. The structure of Ln(Me2pz)3(thf) (Ln = La or Er) is considered to be a symmetrical dimer with four chelating and two bridging Me2pz groups, and two bridging thf ligands, whereas the cyclopentadienyl complexes are most likely dimers with bridging pyrazolate groups, and lattice thf of solvation.
AB - The complexes Er(Me2pz)3(thf) and Ln(Ph2pz)3(thf)n (Ln = Sc, Y, Gd, Er, n = 2; Ln = Lu, n = 3) (Me2pz- = 3,5-dimethylpyrazolate, thf = tetrahydrofuran, Ph2pz- = 3,5-diphenylpyrazolate) have been prepared by reaction of the lanthanoid metal with bis(pentafluorophenyl)mercury and the pyrazole in thf. The Ln(Ph2pz)3(thf)2 complexes are considered to be eight coordinate with three η2-Ph2pz ligands. Other lanthanoid pyrazolate complexes, Y(pz)3(thf)2, La(Me2pz)3(thf), Cp2Ln(Me2pz)(thf)n (Ln = Y, Lu, n = 0; Ln = Lu, n = 1), (C5Me5)2Y(pz)(thf), (C5Me5)2Y(Mepz)(thf), (C5Me5)2Y(Me2pz)-(thf)2 (pz- = pyrazolate, Mepz- = 3-methylpyrazolate, Cp = cyclopentadienyl) have been synthesized by reaction of LnCl3, Cp2LnCl, or (C5Me5)2LnCl with the appropriate sodium pyrazolate in thf. The structure of Ln(Me2pz)3(thf) (Ln = La or Er) is considered to be a symmetrical dimer with four chelating and two bridging Me2pz groups, and two bridging thf ligands, whereas the cyclopentadienyl complexes are most likely dimers with bridging pyrazolate groups, and lattice thf of solvation.
KW - Cyclopentadienides
KW - Lanthanoid complexes
KW - Pyrazolates
UR - http://www.scopus.com/inward/record.url?scp=0000922338&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:0000922338
SN - 0044-2313
VL - 622
SP - 1399
EP - 1403
JO - Zeitschrift fuer Anorganische und Allgemeine Chemie
JF - Zeitschrift fuer Anorganische und Allgemeine Chemie
IS - 8
ER -