2 Homometallic Alkoxides

Table 6.15 Magnesium aryloxides
Metal Aryloxides 517
Bond length ( ˚A) Bond angle ( Ž )
Compound Aryloxide M–O M–O–Ar Ref.
[Mg⊲ 2-OAr⊳2]2 OC6H3But planar Mg2O2 ring,
4-coord. Mg
2-2,6 2-OC6H3Bu
1.823 (3) 178 i
t 2-2,6 [Mg(OAr) 2⊲THF⊳3] tbp, equatorial OAr
OC6H2⊲CF3⊳3-2,4,6
1.819 (3)
1.951 (3)–1.971 (3)
1.917 (4)
1.923 (4)
169
167
179
ii
[Mg(OAr) 2⊲py⊳2] 2-OC6H3⊲NO2⊳2-2,4 1.966 (5) 133 iii
6-coord. Mg 1.940 (5) 136
[Mg(OAr)2⊲N -methylimidazole)2]
2-OC6H3⊲NO2⊳2-2,4 1.964 (5) 135 iii
6-coord. Mg 1.962 (5) 133
i J.C. Calabrese, M.A. Cushing Jr, and S.D. Ittel, Inorg. Chem., 27, 867 (1988).
ii H.W. Roesky, M. Scholz, and M. Noltemeyer, Chem. Ber., 123, 2303 (1990).
iii R. Sarma, F. Ramirez, P. Narayanan, B. McKeever, and J.F. Marecek, J. Am. Chem. Soc., 101,
5015 (1979).
Table 6.16 Calcium aryloxides
Bond Bond
length ( ˚A) angle ( Ž )
Compound Aryloxide M–O M–O–Ar Ref.
[Ca3⊲OAr⊳5⊲HMPA⊳6][OAr.2HOAr] 2-OC6H5 2.33 (1)–2.36 (1) i
triangular cluster, 6-coord. Ca
[Ca(OAr) 2⊲THF⊳3]
tbp, equatorial OAr
3-OC6H5
OC6H2Bu
2.38 (1)–2.44 (1)
t 2-2,6- Me-4
2.201 (6)
2.210 (6)
175
177
ii
[Ca(OAr) 2⊲THF⊳3]
tbp, equatorial OAr at 172ŽC OC6H2But 2-2,6- Me-4
2.197 (3)
2.181 (3)
171
174
iii
[(glycol-5)Ca(OAr)](OAr)⊲OH2⊳
8-coord. Ca
2-OC6H2⊲NO2⊳3- 2,4,6
2.330 (2) iv
[Ca2⊲OAr⊳2⊲OH2⊳10]⊲2OAr⊳⊲2H2O⊳
8-coord. Ca
2-OC6H3⊲NO2⊳2- 2,4
2.361 (5) v
[Ca(OAr) 2⊲bipy⊳2]
8-coord. Ca
2-OC6H2⊲NO2⊳3- 2,4,6
2.292 (10)
2.351 (9)
vi
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Chem., 32, 1970 (1993).
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1141 (1990).
iiiK.F. Tesh, T.P. Hanusa, J.C. Huffman, and C.J. Huffman, Inorg. Chem., 31, 5572 (1992).
ivT.P. Singh, R. Reinhardt, and N.S. Poonia, Ind. J. Chem. A, 23, 976 (1984).
vL.B. Cole and E.M. Holt, J. Chem. Soc., Perkin Trans., 1997 (1986).
viN.S. Poonia, R. Chandra, V.M. Padmanabhan, and V.S. Yadav, J. Coord. Chem., 21, 167
(1990).