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2 Homometallic Alkoxides

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265<br />

[Nd2⊲ -Cl⊳2⊲OCBu t<br />

3⊳4⊲thf⊳2] [Nd⊲OCBu<br />

5 2.090–2.114 (3) – – 130<br />

t<br />

3⊳3⊲CH3CN⊳2] [Nd4⊲ -ONp⊳8⊲ONp⊳4]<br />

Np D CH2Bu<br />

5<br />

5<br />

2.149–2.171 (5)<br />

av. 2.162<br />

2.138 (8)<br />

–<br />

2.320–2.381 (12)<br />

167.5–171.8<br />

av. 170.3<br />

163.9 (t)<br />

131<br />

118<br />

t [Nd2⊲ -OCHBu<br />

av. 2.341 126.6 (b, av.)<br />

t<br />

t<br />

2⊳2⊲OCHBu2⊳4⊲CH3CN⊳] 4 and 5 2.132–2.151 (4)<br />

av. 2.143<br />

2.359–2.394 (4)<br />

av. 2.374<br />

166.4 (t, av.)<br />

127.0 (b, av.)<br />

132<br />

[Nd6⊲ 6-Cl⊳⊲ 3-OPr i ⊳2⊲ -OPr i ⊳9⊲OPr i ⊳6]<br />

[Nd2⊲ -Cl⊳2⊲OCBu<br />

6 av. 2.05 (2) 2.36 (4) ( ,av.)<br />

2.45 (5) ( 3, av.)<br />

– 129<br />

t<br />

3⊳4⊲thf⊳2] 5 2.108–2.114<br />

av. 2.105<br />

– 163.8–174.4<br />

av. 168<br />

130<br />

[Nd2⊲ -OCHPr i<br />

i<br />

2⊳2⊲OCHPr2⊳4⊲thf⊳2] 5 2.146, 2.160 (4) 2.368, 2.394 (4) 159.6, 170.2 (t)<br />

117.9, 130.6 (b)<br />

133<br />

[Nd2⊲ -OCHPr i<br />

i<br />

2⊳2⊲OCHPr2⊳4⊲C5H5N⊳2] 5 2.133, 2.158 (4) 2.380, 2.383 (4) 173.6, 176.1 (t)<br />

120.8, 130.8 (b)<br />

133<br />

[Nd2⊲ -OCHPr i<br />

2⊳⊲OCHPri2 ⊳4⊲ -dme⊳]1<br />

dme D MeOC2H4OMe<br />

[Li(thf) 4]<br />

5 2.144–2.145 (6) 2.359–2.391 (5) 169.3, 174.3 (t)<br />

117.7, 133.0 (b)<br />

133<br />

C [Nd⊲OSiMe3⊳fN⊲SiMe3⊳2g3]<br />

[⊲C5Me5⊳2Sm⊲ -O2C16H10⊳Sm⊲C5Me5⊳2]<br />

4<br />

3<br />

2.173 (11) – 177.1 134<br />

1 [⊲thf⊳⊲C5Me5⊳2Sm⊲ -O2C16H10⊳Sm⊲C5Me5⊳2⊲thf⊳] 4<br />

2.08 (2) – 173.2 135<br />

1 [C5Me5⊳2Sm⊲OC4H8C5Me5⊳⊲thf⊳] 4<br />

2.099 (9) – 166.3 135<br />

1 [⊲thf⊳⊲C5Me5⊳2Sm⊲ -<br />

OSiMe2OSiMe2O⊳Sm⊲C5Me5⊳2⊳⊲thf⊳]<br />

4<br />

2.08 (1) – 165.2 136<br />

1 [SmfOC⊲Bu<br />

2.157 (5) – 173.6 137<br />

t⊳⊲2-CH2NC5H3Me-6⊳2g3] [Dy⊲OCHBu<br />

5 2.116 (2) (t)<br />

2.142, 2.172 (3) (c)<br />

– 168.6 (t)<br />

137.8, 147.8 (c)<br />

138<br />

t<br />

2⊳3⊲CH3CN⊳2] [Yb2⊲ -OCBu<br />

5 2.057, 2.064, 2.063 (5) – 177.0, 177.2, 177.7 132<br />

t<br />

3⊳2fN⊲SiMe3⊳2g2] [Yb⊲OCBu<br />

3 – 2.294–2.320 (6)<br />

av. 2.307<br />

129.6–136.2<br />

av. 133.0<br />

140<br />

t<br />

3⊳2⊲thf⊳2] [f⊲Me3Si⊳3Cg2Yb2⊲ -OEt⊳2⊲Et2O⊳2]<br />

[YbfOC⊲Bu<br />

4<br />

4<br />

2.07, 2.09 (2)<br />

–<br />

–<br />

2.267, 2.276 (10)<br />

155, 175<br />

120.9, 121.0<br />

140<br />

141<br />

t⊳⊲2-CH2NC5H3Me-6⊳g2fN⊲SiMe3⊳2g] [Yb2⊲ -OSiMe2Bu<br />

5 – 2.057, 2.072 (3) 142.3, 143.0 (c) 138<br />

t⊳2⊲OSiMe2But⊳2⊲dme⊳2] [Lu2⊲ -OCMe2CH2OMe⊳3⊲OCMe2CH2OMe⊳3]<br />

5<br />

6 and 7<br />

2.163 (11)<br />

2.053, 2.058 (3) (t)<br />

2.123 (c)<br />

2.269, 2.311 (8)<br />

2.196–2.373 (3)<br />

av. 2.260<br />

172.9 (t)<br />

119.1, 141.5 (b)<br />

166.4, 174.8 (t)<br />

126.6 (c)<br />

129.7 (b, av.)<br />

142<br />

143<br />

b D bridging, c D chelating, t D terminal.<br />

1 Coordination doubtful.

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