2 Homometallic Alkoxides

510
Table 6.10 Lithium aryloxides
Bond length ( ˚A)
Compound Aryloxide M–O Reference
[Li⊲ 3-OAr⊳⊲THF⊳]6
two crystalline forms; two chair Li3O3 rings
stacked upon one another, 4-coord. Li
[Li⊲ 3-OAr⊳⊲THF⊳]4⊲HOAr⊳
distorted cube with one edge opened up
by bridging phenol ligand, 4-coord. Li.
[Li⊲ 3-OAr⊳⊲nmc⊳]4
regular cube, 4-coord. Li, N-methyl caprolactam
[Li4⊲ 3-OAr⊳3⊲NCS⊳⊲HMPA⊳4]
cube, 4-coord. Li, bridging HMPA, terminal NCS
[Li4⊲ 3-di-OAr⊳2⊲HMPA⊳2]
cube, two 4- and two 5-coord. Li
[Li8⊲ 3-di-OAr⊳3⊲O⊳⊲TMEDA⊳2]
two cubes with one common vertex
(oxo group), 4-coord. Li
[Li4⊲ 3-OAr⊳2⊲I⊳2]
cube, 4-coord. Li
[Li⊲ 4-OAr]4
Li4O4 cube, 4-coord. Li, with sodiated methyl
groups; Na atoms interact with phenoxide groups
[Li⊲ 2-OAr⊳]3
planar Li3O3 ring, 2-coord. Li
3-OC6H5
1.911 (21)–1.990 (22)
1.895 (21)–1.992 (22)
3-OC6H5 1.91 (2)–2.05 (2) ii
3-OC6H5 1.88 (2)–2.00 (2) iii
3-OC6H5 1.89 (2)–2.02 (2) iv
N,N0-ethylene bis(salicylideneiminato)
N,N0-ethylene bis(salicylideneiminato)
3-OC6H2⊲CH2NMe2⊳2-
2,6-Me-4
4-OC6H2fCH2Na(tmeda)g-
2-Me2-4,6
2.002 (6) (av.) v
1.985 (9) (mean) v
1.903 (7)–1.934 (9) vi
1.97 (2) (av.) vii
2-OC6HBu t 2 -3,5-Ph 2-2,6 1.78 (1), 1.840 (7) viii
i