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2 Homometallic Alkoxides

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Metal Aryloxides 625<br />

Table 6.41 Simple aryloxides of platinum<br />

Bond Bond<br />

length ( ˚A) angle ( Ž )<br />

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

trans-[Pt(OAr)(H)⊲PEt3⊳2]<br />

square planar Pt<br />

OC6H5 2.098 (9) 124 i<br />

[Pt(OAr)Cl( 2-vinyl-N,N dimethylaniline)]<br />

pseudo-square planar Pd<br />

OC6F5 2.017 (5) 123 ii<br />

cis-[Pt(OAr)Me⊲PMe3⊳2]<br />

[NBu4][Pt(OAr)(CO)⊲C6F5⊳]<br />

square planar Pt, ArO cis to CO<br />

OC6H5<br />

OC6H4⊲NO2⊳-4<br />

2.128 (4)<br />

2.070 (4)<br />

120<br />

125<br />

iii<br />

iv<br />

trans-[Pt(OAr)(H)⊲Pbz3⊳2]<br />

square planar Pt<br />

OC6H5 2.130 (6) 124 v<br />

[Pt(OAr) 2].3EtCN<br />

OAr derived from<br />

PfC6H2⊲OMe⊳3-2,4,6g3,<br />

trans, square planar PtO2P2<br />

[Pt(OAr)Me⊲PMe3⊳]<br />

chelating OAr, O trans to P<br />

[Pt(OAr)Cl].CH2Cl2<br />

square planar Pt, two molecules<br />

⊲MeO⊳3C6H2-P-<br />

2-OC6H2⊲OMe⊳2<br />

OC6H4-<br />

2-CH2CHDCH2-2 OC6H4⊲2<br />

2.044 (5)<br />

2.047 (8)<br />

2.05 (2)<br />

119<br />

119<br />

128<br />

vi<br />

vii<br />

0bipy⊳-2 1.95 (1)<br />

1.94 (1)<br />

126<br />

126<br />

viii<br />

[Pt(OAr)Me(bipy)]<br />

square planar Pt<br />

OC6H5 2.001 (5) 122 ix<br />

[Pt(OAr)(I)Me2(bipy)] octahedral Pt, I trans to Me<br />

OC6H5 2.014 (5) 127 ix<br />

[Pt(OAr)Me⊲PPh2C6F5⊳]<br />

square planar Pt, Me trans to O<br />

OC6F4⊲PPh2⊳-2 2.12 (1) 117 x<br />

i R.L. Cowan and W.C. Trogler, J. Am. Chem. Soc., 111, 4750 (1989).<br />

ii M.K. Cooper, N.J. Hair, and D.W. Yaniuk, J. Organomet. Chem., 150, 157 (1978).<br />

iii K. Osakada, Yong-Joo Kim, and A. Yamamoto, J. Organomet. Chem., 382, 303 (1990).<br />

iv J. Ruiz, V. Rodriguez, G. Lopez, P.A. Chaloner, and P.B. Hitchcock, Organometallics, 15,<br />

1662 (1996).<br />

v A.L. Seligson, R.L. Cowan, and W.C. Trogler, Inorg. Chem., 30, 3371 (1991).<br />

vi Jui-Sui Sun, C.E. Uzelmeier, D.L. Ward, and K.R. Dunbar, Polyhedron, 17, 2049 (1998).<br />

vii Yong-Joo Kim, Jae-Young Lee, and Kohtaro Osakada, J. Organomet. Chem., 558, 41 (1998).<br />

viii D.A. Bardwell, J.G. Crossley, J.C. Jeffery, A.G. Orpen, E. Psillakis, E.E.M. Tilley, and<br />

M.D. Ward, Polyhedron, 13, 2291 (1994).<br />

ix G.M. Kapteijn, M.D. Meijer, D.M. Grove, N. Veldman, A.L. Spek, and G. van Koten, Inorg.<br />

Chim. Acta, 264, 211 (1997).<br />

x S. Park, M. Pontier-Johnson, and D.M. Roundhill, Inorg. Chem., 29, 2689 (1990).<br />

structurally characterized with I trans to Me but present as two isomers in<br />

solution. 491 Treatment of cis-[PdMe2(PMe3)2] with 2-allylphenol yields trans-<br />

[Pd(OC6H4CH2CHDCH2-2)Me(PMe3)2] in which the allyl group is unbound. 32<br />

However, treatment of the alkoxide cis-[PtMefOCH⊲CF3⊳2gfHOCH⊲CF3⊳2g⊲PMe3⊳2]<br />

with 2-allylphenol yielded [Pt(OC6H4- 2 -CH2CHDCH2-2)Me(PMe3)] with the<br />

chelating olefin trans to the Pt–Me bond.<br />

The use of alkoxide or amide intermediates to form aryloxides is also quite common.<br />

Reaction of [NiMe(OMe)(PMe3)]2 with acidic phenols in the presence of PMe3 yields<br />

trans-[NiMe(OAr)(PMe3)2]. 494 The bulky amido compound [PdClfN⊲SiMe3⊳2g⊲TMEDA⊳]<br />

reacts with phenols to yield [PdCl(OAr)(TMEDA)]. 495

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