
%0 Journal Article
%A Abrahams, CT 
%A Deacon, GB 
%A Forsyth, CM 
%A Patalinghug, WC 
%A Skelton, BW 
%A White, AH 
%T Organoamido- and Aryloxo-lanthanoids. XII. The Coordination Chemistry of Bis(2-phenylindol-1-yl)ytterbium(II), and the X-Ray Crystal Structures of Yb(pin)<sub>2</sub>(diglyme)(thf) and [Yb(pin)<sub>2</sub>(dme)]<sub>2</sub> (pin = 2-Phenylindol-1-yl, diglyme = Bis(2-methoxyethyl) Ether, thf Equals Tetrahydrofuran, dme = 1,2-Dimethoxyethane)
%J Australian Journal of Chemistry
%D 1995/12/01
%V 48
%N 12
%P 1933-1947
%K 
%R https://doi.org/10.1071/CH9951933
%U https://www.publish.csiro.au/paper/CH9951933 
%X With the facile displacement being utilized of thf from Yb(pin)2(thf)4 (pin = 2-phenylindol-1-yl, thf = tetrahydrofuran) in toluene solution, the complexes Yb(pin)2(dme)2 (dme = 1,2- dimethoxyethane), Yb(pin)2 (tmen)(tmen = N,N,N&#8242;,N&#8242;-tetramethylethane-1,2-diamine) and Yb(pin)2(diglyme)(thf) (diglyme = bis(2-methoxyethyl) ether) have been prepared from the respective ligands and Yb(pin)2(thf)4. Yb(pin)2 (diglyme) (thf) [monoclinic, space group P 21 /c, a 15.35(1), b 16.179(5), c 14.45(2) &#506;, &#946; 107.51(8)&#176;, Z 4, R 0.044 for 2956 (I > 3&#963;(I)) 'observed' reflections] has a monomeric six-coordinate structure with transoid nitrogen donor atoms, N-Yb-N 143.6(4)&#176; and an irregular coordination polyhedron described as either a distorted trigonal prism or a monocapped square pyramid. Attempted crystallization of Yb(pin)2 (thf) by partial desolvation of Yb(pin)2(thf)4 in hot toluene, containing a trace of dme, gave a mixture of red Yb(pin)2(thf) and orange [Yb(pin)2(dme)]2. The latter was independently synthesized by partial desolvation of Yb(pin)2(dme)2 in toluene. An X-ray crystal structure showed [Yb(pin)2(dme)]2 [monoclinic, space group P 21/c, a 11 .614(2), b 15.945(7), c 15.327(4) &#506;, &#946; 110.19(2)&#176;, Z 2 dimers, R 0.070 for 2314 (I &#8805; 3&#963;(I)) 'observed' reflections] to be a dimer with two bridging pin ligands, coordinated through nitrogen only. There is an approximately square pyramidal five-coordinate ytterbium environment with an apical dme oxygen, and with two bridging nitrogens, a terminal nitrogen, and a dme oxygen in the basal plane. 
