Chemistry Reference
In-Depth Information
Table 6.45
(
Continued
)
Bond
Bond
length ( A)
angle (
Ž
)
Compound
Aryloxide
M-O
-O-Ar Ref.
[Me
3
SiCH
2
Zn
2
-
OAr
2
ZnCH
2
SiMe
3
]
trigonal planar Zn
2
-OC
6
H
3
Pr
i
2
-2,6
1.98 (1), 1.93 (1)
1.94 (1), 1.94 (1)
xii
[fMe
3
SiCH
2
Zn
2
-OAr
2
g
2
Zn]
2
-OC
6
H
3
Pr
i
2
-2,6
1.950 (2) - 1.985 (2)
xii
trigonal planar and
tetrahedral Zn
[f
Me
3
Si
2
NgZn
2
-
OAr
2
ZnfN
SiMe
3
2
g]
trigonal planar Zn
2
-OC
6
H
3
Pr
i
2
-2,6
1.951 (5), 1.944 (5)
1.951 (5), 1.962 (4)
xii
[(pz)Zn(OAr)]
OC
6
H
4
NO
2
-4
1.860 (2)
132
xiv
pyrazolylborate, tetrahedral Zn
[Zn(OAr)
2
BPh
2
][BPh
4
]
OC
6
H
4
2
0
-bipy
-2
2.125 (5), 2.136 (5)
xv
could be considered an
[
ArO
2
BPh
2
] anion
i
D. Weiss, A. Schier, and H. Schmidbaur,
Z. Naturforsch. B
,
53
, 1307 (1998).
ii
D.J. Darensbourg, M.S. Zimmer, P. Rainey, and D.L. Larkins,
Inorg. Chem.
,
37
, 2852 (1998).
iii
D.J. Darensbourg, S.A. Niezgoda, J.D. Draper, and J.H. Reibenspies,
Inorg. Chem.
,
38
, 1356
(1999).
iv
R.L. Geerts, J.C. Huffmann, and K.G. Caulton,
Inorg. Chem.
,
25
, 590 (1986).
v
R.L. Geerts, J.C. Huffmann, and K.G. Caulton,
Inorg. Chem.
,
25
, 1803 (1986).
vi
D.J. Darensbourg, M.W. Holtcamp, G.E. Struck, M.S. Zimmer, S.A. Niezgoda, P. Rainey, J.B.
Robertson, J.D. Draper, and J.H. Reibenspies,
J. Am. Chem. Soc
,
121
, 107 (1999).
vii
D.J. Darensbourg, J.C. Yoder, G.E. Struck, M.W. Holtcamp, J.D. Draper, and J H. Reiben-
spies,
Inorg. Chim. Acta
,
274
, 115 (1998).
viii
A. Abufarag and H. Vahrenkamp,
Inorg. Chem.
,
34
, 3279 (1995).
ix
F. Connac, N. Habaddi, Y. Lucchese, M. Dartiguenave, L. Lamande, M. Sanchez, M. Simard,
and A.L. Beauchamp,
Inorg. Chim. Acta
,
256
, 107 (1997).
x
J. Boersma, A.L. Spek, and J.G. Noltes,
J. Organomet. Chem.
81
, 7 (1974).
xi
M. Parvez, G.L. BergStresser, and H.G. Richey,
Acta. Crystallog. C.
,
48
, 641 (1992).
xii
M.M. Olmstead, P.P. Power, and S.C. Shoner,
J. Am. Chem. Soc.
,
113
, 3379 (1991).
xiii
H. Grutzmacher, M. Steiner, H. Pritzkow, L. Zsolnai, G. Huttner, and A. Sebald,
Chem. Ber.
,
125
, 2199 (1992).
xiv
R.Walz,K.Weis,M.Ruf,andH.Vahrenkamp,
Chem. Ber.
,
130
, 975 (1997).
xv
D.A. Bardwell, J.C. Jeffery, and M.D. Ward,
Inorg. Chim. Acta
,
241
, 125 (1996).
has been stimulated by the widespread use of these derivatives to carry out impor-
tant organic transformations.
13
,
536
This reactivity is a direct consequence of the Lewis
acidity of the aluminium aryloxides. Early work demonstrated that aluminium phenoxide
carried out the
ortho
-alkylation of phenols by olefins.
537
,
538
More recently the use
of bulky aryloxide ligands attached to aluminium to generate monomeric, “designer”
Lewis acid catalysts has been pioneered by Yamamoto and co-workers.
13
Important
examples include the compounds [Al(Me)(OC
6
H
2
Bu
t
2
-2,6-X-4)
2
](XD Me, acronym
“MAD”
539
,
540
and X D Br, “MABR”
541
), [Al(Me)(OC
6
H
3
Ph
2
-2,6)
2
](“MAPH”
542
)and
[Al(OC
6
H
3
Ph
2
-2,6)
3
](“AT P H ”
543
). These compounds are all easily obtained by adding
