Chemistry Reference
In-Depth Information
Bond length ( A)
Bond angle (
Ž
)
Compound
Aryloxide
M-O
M-O-Ar
Ref.
Homoleptic aryloxides and adducts
[Nb(OAr)
5
]
tbp Nb
OC
6
H
3
Me
2
-2,6
1.901 (2)
1.893 (2)
1.903 (2)
1.890 (2)
1.910 (2)
167
145
144
169
157
i
trans
-[Nb(OAr)
2
dmpe
2
]
distorted octahedron
OC
6
H
4
Me-4
2.023 (3)
2.022 (3)
156
171
i
[Nb(OAr)
2
(dmpe)
2
]
C
[Nb(OAr)
6
]
trans
OAr in cation, 6-coord. Nb
OC
6
H
3
Me
2
-3,5
1.917 (2)
1.96 (1)
1.95 (1)
1.98 (1)
1.95 (1)
1.94 (1)
1.95 (1)
177
143
150
146
161
153
149
i, ii
Mixed aryloxy halides, amides, etc.
[Nb(OAr)
2
Cl
3
]
square pyramidal Nb, axial OAr
OC
6
HPh
4
-2,3,5,6
1.820 (3)
1.870 (3)
163
151
iii
OC
6
HPh
2
-2,6-Bu
t
2
-3,5
[Nb(OAr)
2
Cl
3
]
square pyramidal Nb, axial OAr
1.809 (1)
1.881 (1)
178
141
iv
[Nb(OAr)
2
I
3
]
tbp Nb, axial OAr
OC
6
HPh
4
-2,3,5,6
1.879 (4)
179
v
[Nb
2
-Cl
OAr
2
Cl
2
]
2
edge-shared bis-octahedron, OAr
trans
to
bridging chloride groups, 6-coord. Nb
OC
6
H
3
Pr
i
2
-2,6
1.816 (7)
1.816 (7)
173
169
vi
[Nb(OAr)Cl
4
(THF)]
distorted octahedron, THF
trans
to OAr
OC
6
H
3
Me
2
-2,6
1.819 (8)
180
vii
