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2 Homometallic Alkoxides

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524<br />

Table 6.19 (Continued)<br />

Bond length ( ˚A) Bond angle ( Ž )<br />

Compound Aryloxide M–O M–O–Ar Ref.<br />

[Ce(OAr) 3⊲Me4urea⊳3]<br />

distorted tricapped trigonal prism<br />

OC6H2⊲NO2⊳3-2,4,6 2.442 (5), 2.444 (7)<br />

2.432 (8)<br />

xx<br />

[Ce(OAr) 2⊲OH2⊳6]⊲OAr⊳.6H2O<br />

two forms, 9-coord. Ce<br />

OC6H2⊲NO2⊳3-2,4,6 I: 2.44 (9), 2.39 (1)<br />

II: 2.43 (1), 2.36 (1)<br />

xxi<br />

[Pr(OAr) 2⊲OH2⊳6]⊲OAr⊳.6H2O OC6H2⊲NO2⊳3-2,4,6 2.389 (4)<br />

2.398 (4)<br />

146<br />

146<br />

xv<br />

[Pr(OAr) 2⊲OH2⊳6]⊲OAr⊳.6H2O (‘aged’) OC6H2⊲NO2⊳3-2,4,6 2.401 (3)<br />

2.418 (3)<br />

145<br />

142<br />

xv<br />

[Pr(OAr) 3⊲THF⊳2]<br />

tbp axial THF<br />

OC6H3Pri 2-2,6 2.142 (8)<br />

2.158 (9)<br />

151<br />

174<br />

xxii<br />

2.216 (9)<br />

173<br />

[PrCu⊲ 2-OAr⊳⊲HOAr⊳⊲ 2-OH⊳⊲hfacac⊳3]<br />

tbp Cu, 9-coord. Pr<br />

2-OC6H2⊲CH2NMe2⊳2-2,6-Me-4 2.424 (8), 1.958 (8) xxiii<br />

[Pr(OAr) 3⊲OH2⊳2]<br />

distorted pentagonal bipyramid<br />

OC6H2⊲CH2NMe2⊳3-2,4,6 2.311 (3)<br />

2.280 (3)<br />

132<br />

146<br />

xxiv<br />

2.269 (3)<br />

163<br />

[Nd(OAr) 2⊲OH2⊳6]⊲OAr⊳.6H2O] OC6H2⊲NO2⊳3-2,4,6 2.364 (6)<br />

2.407 (5)<br />

149<br />

150<br />

xxv<br />

2.407 (5)<br />

150<br />

[⊲ArO⊳2Nd⊲ 2-O- 6-OAr⊳2Nd(OAr) 2] OC6H3Pri 2-2,6 2.124 (9)<br />

2.120 (8)<br />

164<br />

164<br />

xxii<br />

2-O- 6-C6H3Pri [Nd(OAr) 3⊲THF⊳2]<br />

tbp, axial THF<br />

2-2,6 OC6H3Pr<br />

2.211 (8) 162<br />

i 2-2,6 xxii<br />

[Nd(OAr) 3⊲thf⊳2].2THF<br />

distorted tbp, OAr and THF axial<br />

OC6H3Ph2-2,6 2.208 (9)<br />

2.16 (1)<br />

155<br />

159<br />

xxvi<br />

2.203 (9)<br />

170<br />

[Nd(OAr) 3(dme)]dme<br />

square pyramid, axial OAr, cisoid basal OAr<br />

OC6H3Ph2-2,6 2.198 (5)<br />

2.179 (5)<br />

171<br />

154<br />

xxvii<br />

2.197 (5)<br />

150

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