TY - JOUR
T1 - Novel monopentamethylcyclopentadienyl alkoxides of La and Ce; X-ray crystal structure of (C5Me5Ce(OCMe3)2)2
AU - Heeres, Hero J.
AU - Teuben, Jan H.
AU - Rogers, Robin D.
N1 - Relation: http://www.rug.nl/scheikunde/
date_submitted:2005
Rights: University of Groningen. Stratingh Institute
PY - 1989
Y1 - 1989
N2 - Treatment of monomeric (C5Me5)2LnCH(SiMe3)2 (Ln = La and Ce) compounds with HOCMe3 gives the novel compounds (C5Me5Ln(OCMe3)2)2. An X-ray diffraction study of the cerium analogue reveals a dimeric structure with two symmetrically bridging and two terminal alkoxide ligands in a cis configuration. Crystal data: monoclinic space group P21/c, a 13.163(5), b 17.429(4), c 18.988(4) Å, β 100.75(2) °, V 4279.7 Å3 and Z = 4. Least-squares refinement leads to a final R (based on F) value of 0.044 for 4860 observed reflections. Treatment of (C5Me5)2CeCH(SiMe3)2 with an excess of 2,6-di-t-butylphenol at room temperature gives (C5Me5)2(2,6-di-t-butylphenoxo)cerium. Tris(2,6-di-t-butylphenoxo)cerium and C5Me5H are formed when the mixture is heated to 80 °C. The intermediate (C5Me5)bis(2,6-di-t-butylphenoxo)cerium is not observed under these conditions.
AB - Treatment of monomeric (C5Me5)2LnCH(SiMe3)2 (Ln = La and Ce) compounds with HOCMe3 gives the novel compounds (C5Me5Ln(OCMe3)2)2. An X-ray diffraction study of the cerium analogue reveals a dimeric structure with two symmetrically bridging and two terminal alkoxide ligands in a cis configuration. Crystal data: monoclinic space group P21/c, a 13.163(5), b 17.429(4), c 18.988(4) Å, β 100.75(2) °, V 4279.7 Å3 and Z = 4. Least-squares refinement leads to a final R (based on F) value of 0.044 for 4860 observed reflections. Treatment of (C5Me5)2CeCH(SiMe3)2 with an excess of 2,6-di-t-butylphenol at room temperature gives (C5Me5)2(2,6-di-t-butylphenoxo)cerium. Tris(2,6-di-t-butylphenoxo)cerium and C5Me5H are formed when the mixture is heated to 80 °C. The intermediate (C5Me5)bis(2,6-di-t-butylphenoxo)cerium is not observed under these conditions.
U2 - 10.1016/0022-328X(89)85334-3
DO - 10.1016/0022-328X(89)85334-3
M3 - Article
SN - 0022-328X
VL - 364
SP - 87
EP - 96
JO - Journal of Organometallic Chemistry
JF - Journal of Organometallic Chemistry
IS - 1-2
ER -