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2 Homometallic Alkoxides

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279<br />

[Me4Ti2⊲ -OMe⊳2⊲tritox⊳2]<br />

tritox D But 3CO [f⊲Me3Si⊳2C5H3gTi⊲O3C6H9⊳]<br />

5<br />

4<br />

1.752 (6) (tritox) 2.015 (4) (MeO) 174.4 (t)<br />

125.3 (b)<br />

187<br />

1 1.824, 1.832,<br />

1.833 (2)<br />

– 114.9, 115.0, 115.1 188<br />

[⊲C5H5⊳4Ti2⊲ -OMe⊳2] 41 – 2.065 (2) 125.6 189<br />

[⊲C5H5⊳4Ti2⊲ -OEt⊳2] 41 [Ti⊲OCBu<br />

– 2.076 (3) 132.1 189<br />

t<br />

2CH2PMe2⊳2Cl] [Zr2⊲ -OPr<br />

5 1.841, 1.843 (3) – – 190<br />

i ⊳2⊲OPr i ⊳6⊲PriOH⊳2] 2 6 1.942, 1.945 (5)<br />

⊲PriO⊳ 2.066, 2.271 (5)<br />

⊲Pri 2.161, 2.179 (4) Term. 169.2, 174.0 (t)<br />

130.7, 132.1 ⊲Pr<br />

OH⊳<br />

iOH⊳ 192<br />

123.7, 129.0 (b)<br />

[⊲Me3Si⊳3SiZr⊲OBu t ⊳3] 4 1.90, 1.88 (1) – 165, 167 193<br />

[⊲thf⊳2Cl3Zr⊲O2C6H10⊳ZrCl3⊲thf⊳2]<br />

[Zr5N(NH) 4⊲NH2⊳4⊲OCBu<br />

6 1.870 (5) – 176.0 194<br />

t<br />

3⊳5] [ZrfOCMe⊲CF3⊳2g4]<br />

6<br />

4<br />

av. 1.927 (19)<br />

1.902–1.930 (12)<br />

av. 1.916<br />

–<br />

–<br />

av. 177.7<br />

153.2–174.6<br />

av. 163.8<br />

195<br />

196<br />

[(oep)Zr⊲OBu t ⊳2]<br />

oep D octaethylporphyrin<br />

6 1.947, 1.948 (2) – 175.6, 178.1 197<br />

[Zr4f⊲ -OCH2⊳3CMeg2⊲ -OPr i ⊳2⊲OPr i ⊳8] 6 av. 1.94 (1) 2.171 (6) (PriO) 2.16 (2) (L)<br />

– 179<br />

[Hf2⊲ -OPr i ⊳2⊲OPr i ⊳6⊲PriOH⊳2] 6 1.932, 1.938,<br />

1.911, 1.944 (8)<br />

⊲PriO⊳ 2.143, 2.185,<br />

2.082, 2.243 (7)<br />

⊲Pri 2.148, 2.160,<br />

167.4 (t, av.) 200<br />

OH⊳<br />

2.155, 2.156 (6)<br />

[⊲ButO⊳3Hf⊲ -Cl⊳⊲ -OBu t ⊳⊲ -<br />

NHPMe3⊳Hf⊲OBu t ⊳3]<br />

[Hf⊲OSiPh2OSiPh2OSiPh2O⊳2⊲py⊳2]<br />

[Hf2⊲ -OPr<br />

6<br />

6<br />

av. 1.938 (7)<br />

1.961, 2.014 (5)<br />

2.202, 2.209 (7)<br />

–<br />

–<br />

148.8, 158.9<br />

198<br />

199<br />

i ⊳2⊲OPr i ⊳6⊲PriOH⊳⊲py⊳] 6 1.929, 1.944 (7)<br />

⊲PriO⊳ 2.154 (6) (PriOH) 2.175, 2.178 (5) – 200<br />

b D bridging, t D terminal; L D N⊲C2H4O⊳3.<br />

1 Coordination doubtful; 2 Average of data from four independent molecules.

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