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2 Homometallic Alkoxides

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355<br />

[⊲thf⊳⊲ButO⊳Yf⊲ -OBu t ⊳⊲ -<br />

6 4 YO, 2.005 (4)<br />

YO, 2.252, 2.256 (6) – 505<br />

CH3⊳AlMe2g2]<br />

[Yf⊲ -OBu<br />

Y(thf), 2.388 (7) AlO, 1.841 (6)<br />

t ⊳⊲ -CH3⊳AlMe2g3] 6 4 – YO, 2.209 (14)<br />

AlO, 1.864 (20)<br />

– 505<br />

[⊲C5H4SiMe3⊳Yf⊲ -OBu t ⊳⊲ -<br />

5<br />

CH3⊳AlMe2g2]<br />

1 4 – YO, 2.280 (4)<br />

– 449<br />

AlO, 1.84 (4)<br />

[LafOC2H4⊳3Ng2fNb⊲OPr i ⊳4g3] 8 6 NbO, 1.915 (8) LaO, av. 2.499 (6)<br />

NbO, av. 2.078 (6)<br />

– 506<br />

[⊲PriO⊳3Nb⊲ -OPr i ⊳3La⊲OPr i ⊳⊲ -<br />

OPri⊳2Nb⊲OPr i ⊳4]<br />

6 6 LaO, 2.164 (7)<br />

Nb[1]O, 1.859–1.880<br />

Nb[2]O, 1.898–1.921<br />

LaO, 2.455, 2.465 (7)<br />

NbO, 2.009–2.087<br />

– 497<br />

[f⊲PriO⊳2Al⊲ -<br />

OPri⊳2g2Pr⊲PriOH⊳ ⊲Cl⊳]2<br />

7 4 PrO(Pri [Ge⊲ -OBu<br />

OH), 2.525 (8)<br />

AlO, 1.724 (tCb, av.)<br />

PrO, av. 2.397 – 507<br />

t ⊳3Eu⊲ -OBu t ⊳3Ge] 6 3 – EuO, 2.496 (6)<br />

GeO, 1.894 (7)<br />

– 487<br />

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

1 Coordination doubtful.

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