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2 Homometallic Alkoxides

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6.2.10 Group 9 Metal Aryloxides<br />

Metal Aryloxides 617<br />

Aryloxide coordination compounds of Co(II) andCo(III) typically adopt octahedral<br />

geometries (Table 6.36). In a number of these derivatives the metal coordination sphere<br />

is completed by chelation of ortho-substituents on the aryloxide, e.g. in [Co(OC6H2Cl3-<br />

2,4,6)2L2] (LD imidazole, L2 D TMEDA) compounds where Co–Cl interactions are<br />

present. 481,482 The complex [Co(OPh)(PPh3)3] 483 is tetrahedral while treatment of<br />

Table 6.36 Simple aryloxides of cobalt<br />

Bond Bond<br />

length ( ˚A) angle ( Ž )<br />

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

[Co(OAr)⊲PPh3⊳3]<br />

tetrahedral Co<br />

[Co(OAr)⊲PPh3⊳3]<br />

tbp Co, axial O and P<br />

[Co(OAr) 2⊲N -methylimidazole⊳2]<br />

6-coord. Co, Cl bound<br />

[Co(OAr) 2(TMEDA)]<br />

6-coord. Co, trans-O, Cl bound<br />

[Co(OAr) 2⊲N-methylimidazole⊳2]<br />

6-coord. Co, trans O(Ar), cis N<br />

[Co(OAr) 3]<br />

6-coord. Co, mer-N3O3<br />

[Co(OAr) 2][PF6].MeCN<br />

cis-CoO2N4 core<br />

[HCo(OAr)⊲O2CMe⊳⊲PMe3⊳2]<br />

metallated formyl phenoxide<br />

[ClCo(OAr)⊲O2CMe⊲PMe3⊳2]<br />

metallated formyl phenoxide<br />

[BrCo(OAr)⊲O2CMe⊳⊲PMe3⊳2]<br />

metallated formyl phenoxide<br />

[ICo(OAr) 2⊲O2CMe⊳⊲PMe3⊳2]<br />

metallated formyl phenoxide<br />

OC6H5 1.900 (9) 138 i<br />

OC6H2Me-4-Bu t - 2.001 (2) 120 ii<br />

6-PPh2-2<br />

OC6H2Cl3-2,4,6 1.898 (8) 131 iii<br />

1.889 (8) 133<br />

OC6H2Cl3-2,4,6 1.919 (3) 130 iv<br />

1.929 (3) 129<br />

OC6H4⊲NO2⊳-2 1.972 (2) 132 v<br />

1.978 (2) 127<br />

OC6H4⊲20py⊳-2 1.83 (1) 121 vi<br />

1.885 (9) 117<br />

1.83 (1) 121<br />

2-OC6H4⊲20-bipy⊳-2 1.886 (4) 120 vii<br />

1.869 (3) 125<br />

OC6H2But-6-Me- 4- 1-CO 1.981 (3) 111 viii<br />

OC6H2But-6-Me- 4- 1-CO 1.977 (2) 113 ix<br />

OC6H2But-6-Me- 4- 1-CO 1.978 (4) 113 ix<br />

OC6H2But-6-Me- 4- 1-CO 1.965 (2) 110 ix<br />

iY. Hayashi, T. Yamamoto, A. Yamamoto, S. Komiya, and Y. Kushi, J. Am. Chem. Soc., 108,<br />

385 (1986).<br />

iiH.-F. Klein, A. Brand, and G. Cordier, Z. Naturforsch. B, 53, 307 (1998).<br />

iiiM.B. Cingi, A.M.M. Lanfredi, A. Tiripicchio, J. Reedijk, and R. van Landschoot, Inorg. Chim.<br />

Acta, 39, 181 (1980).<br />

ivM. Basturkmen, D. Kisakurek, W.L. Driessen, S. Gorter, and J. Reedijk, Inorg, Chim. Acta,<br />

271, 19 (1988).<br />

vR.G. Little, Acta Crystallogr. B, 35, 2398 (1979).<br />

viP. Ganis, A. Saporito, A. Vitagliano, and G. Valle, Inorg. Chim. Acta, 142, 75 (1988).<br />

viiJ.C. Jeffery, E. Schatz, and M.D. Ward, J. Chem. Soc., Dalton Trans., 1921 (1992).<br />

viiiH.-F. Klein, S. Haller, Hongjian Sun, Xiaoyan Li, T. Jung, C. Rohr, U. Florke, and H.-J.<br />

Haupt, Z. Naturforsch. B, 53, 587 (1998).<br />

ixH.-F. Klein, S. Haller, Hongjian Sun, Xiaoyan Li, T. Jung, C. Rohr, U. Florke, and H.-J.<br />

Haupt, Z. Naturforsch. B, 53, 856 (1998).

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