TY - JOUR
T1 - Organoamido- and aryloxo-lanthanoids. v. preparations of low-coordinate lanthanoid(ii) phenolates, ln (oc6h2but 2-2, 6-x-4)2 thf)n(ln = yb or eu; x = h, me or but; n = 2 or 3) and the x-ray crystal structure of five-coordinate [yb (oc6h2but 2-2, 6-x-4)2 thf)3].thf
AU - Deacon, Glen B.
AU - Feng, Tiecheng
AU - Mac Kinnon, Peter
AU - Newnham, Russell H.
AU - Nickel, Siegbert
AU - Skelton, Brian W
AU - White, Allan H
PY - 1993
Y1 - 1993
N2 - Lanthanoid (II) complexes of bulky aryl oxides, Ln (OC6H2But 2-2, 6-X-4)2(Ln = Yb or Eu; X = H, Me or But) have been prepared by one or more of the following methods: (i) reaction of Ln (C6F5)2with the appropriate phenol, (ii) reaction of the lanthanoid metal, Hg(C6F5)2and the phenol, and (iii) reaction of the lanthanoid metal with the corresponding thallium(I) phenolate, in tetrahydrofuran (thf), and they have been isolated as Ln (OC6H2But 2-2, 6-X-4)2thf)3complexes. Crystallization of Yb (OC6H2But 2-2, 6-X-4)2 thf)3(X = H or Me) from toluene yields Yb (OC6H2But 2-2, 6-X-4)2 thf)2. The X-ray crystal structure of [ Yb (OC6H2But 32, 4, 6)2 thf)3]. thf [monoclinic, a 10.20(1), b 32.97(2), c 16.018(4) Â, β 93.52(8)°, V 5375 Â3Z 4, 2734 'observed' data refined to R 0.070] shows distorted square pyramidal five coordination for ytterbium with an apical thf oxygen [ Yb -O 2.44(1)Â], and transoidphenolate oxygens [ Yb -O 2.21(1), 2.22(1)Â, O- Yb -O 149.0(6)°] and transthf oxygens [ Yb -O 2.47(2), 2.48(1)Â, O-Yb -O 177.3(5)°] in the square plane. Four methyl groups (Yb…C 3.89-4.15 Â) across the square plane away from the apical oxygen may block coordination of an additional ligand. X-Ray structures of Yb (OC6H2But 2-2, 6-Me-4)2thf)n showing four coordination (n = 2) and five coordination (n = 3), given in a preliminary communication,1are further discussed.
AB - Lanthanoid (II) complexes of bulky aryl oxides, Ln (OC6H2But 2-2, 6-X-4)2(Ln = Yb or Eu; X = H, Me or But) have been prepared by one or more of the following methods: (i) reaction of Ln (C6F5)2with the appropriate phenol, (ii) reaction of the lanthanoid metal, Hg(C6F5)2and the phenol, and (iii) reaction of the lanthanoid metal with the corresponding thallium(I) phenolate, in tetrahydrofuran (thf), and they have been isolated as Ln (OC6H2But 2-2, 6-X-4)2thf)3complexes. Crystallization of Yb (OC6H2But 2-2, 6-X-4)2 thf)3(X = H or Me) from toluene yields Yb (OC6H2But 2-2, 6-X-4)2 thf)2. The X-ray crystal structure of [ Yb (OC6H2But 32, 4, 6)2 thf)3]. thf [monoclinic, a 10.20(1), b 32.97(2), c 16.018(4) Â, β 93.52(8)°, V 5375 Â3Z 4, 2734 'observed' data refined to R 0.070] shows distorted square pyramidal five coordination for ytterbium with an apical thf oxygen [ Yb -O 2.44(1)Â], and transoidphenolate oxygens [ Yb -O 2.21(1), 2.22(1)Â, O- Yb -O 149.0(6)°] and transthf oxygens [ Yb -O 2.47(2), 2.48(1)Â, O-Yb -O 177.3(5)°] in the square plane. Four methyl groups (Yb…C 3.89-4.15 Â) across the square plane away from the apical oxygen may block coordination of an additional ligand. X-Ray structures of Yb (OC6H2But 2-2, 6-Me-4)2thf)n showing four coordination (n = 2) and five coordination (n = 3), given in a preliminary communication,1are further discussed.
UR - http://www.scopus.com/inward/record.url?scp=84970588348&partnerID=8YFLogxK
U2 - 10.1071/CH9930387
DO - 10.1071/CH9930387
M3 - Article
AN - SCOPUS:84970588348
VL - 46
SP - 387
EP - 399
JO - Australian Journal of Chemistry
JF - Australian Journal of Chemistry
SN - 0004-9425
IS - 3
ER -