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2 Homometallic Alkoxides

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534<br />

Table 6.20 Actinide aryloxides<br />

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

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

[Th(OAr) 4]<br />

tetrahedral Th<br />

[⊲pyrazolyl⊳2Th(OAr) 2]<br />

8-coord. Th<br />

OC6H3But 2-2,6 2.189 (6) 154 i<br />

OC6H5<br />

2.181 (6)<br />

2.172 (6)<br />

[Th(OAr) 2⊲CH2-py-6Me⊳2]<br />

6-coord. Th<br />

OC6H3But 2-2,6 2.190 (9) 175 iii<br />

[Th(OAr) 2⊲CH2SiMe3⊳2] OC6H3But 2-2,6 2.15 (1)<br />

2.13 (1)<br />

162<br />

177<br />

iv<br />

[Th3⊲ 3-H⊳2⊲ 2-H⊳4⊲OAr⊳6]<br />

triangular cluster, all terminal OAr<br />

OC6H3But 2-2,6 2.164 (7)<br />

2.126 (7)<br />

178<br />

168<br />

iv<br />

2.158 (7)<br />

179<br />

2.144 (7)<br />

166<br />

2.139 (7)<br />

178<br />

2.128 (7)<br />

171<br />

[Th(OAr) 4⊲py⊳2].toluene<br />

cis py ligands<br />

OC6H3Me2-2,6 2.211 (6)<br />

2.188 (6)<br />

169<br />

176<br />

i<br />

2.206 (6)<br />

172<br />

2.183 (6)<br />

176<br />

[⊲ArO⊳⊲H2O⊳6Th⊲ 2-<br />

OH2⊳Th(OAr)⊲OH2⊳6]⊲OAr⊳4.20H2O<br />

[Cp<br />

OC6H2⊲NO2⊳3-2,4,6 2.366 (3) 156 v<br />

Ł Th(OAr) 2Br]<br />

three-legged piano stool<br />

OC6H3But 2-2,6 2.18 (1)<br />

2.139 (8)<br />

162<br />

170<br />

vi<br />

173<br />

169<br />

ii

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