2 Homometallic Alkoxides

415
[Nb4⊲ -O⊳4⊲ -O2CCMe:CH2⊳4OPr i ⊳8]
[Nb4⊲ 4-O⊳2f⊲ -⊲OCH2⊳2CMeCO2g2⊲OEt⊳10]
⊲NBu4⊳3[Nb2W4⊲O⊳6⊲ 6-O⊳⊲ -O⊳11⊲ -OMe⊳]
⊲NBu4⊳3[Nb2W4⊲O⊳5⊲ 6-O⊳⊲ -O⊳12⊲OSiMe2Bu t ⊳]
[Nb4Pb6⊲ 4-O⊳4⊲ 3-OEt⊳4⊲ -OEt⊳12⊲OEt⊳8]
[Ta2⊲ -O⊳⊲ -OPr i ⊳⊲OPr i ⊳7⊲Pr i OH⊳]
[Ta7⊲ 3-O⊳3⊲ -O⊳6⊲ -OPr i ⊳4⊲OPr i ⊳13]
[Ta8⊲ 3-O⊳2⊲ -O⊳8⊲ -OEt⊳6⊲OEt⊳14]
[Ta5⊲ 3-O⊳4⊲ -O⊳3⊲ -OBu t ⊳⊲OBu t ⊳10]
[Ta4Zn2⊲ 3-O⊳⊲ -O⊳2⊲ -OPr i ⊳6⊲OPr i ⊳8I2]
t D terminal.
6
6
6
6
6, 6
6
6
6
6
6(Ta)
NbO, 1.889–1.936 (3) ( ) 146.2, 150.2 142
av. 1.905
NbO, 1.911, 1.945 (5) ( ) 114.4 143
t, , 6 MO, 1.59–1.74 (1) (t), av. 1.66, 86.2–98.8, av. 90.0; 80
MO, 1.80–2.04 (1) ( ), av. 1.92, and 172.9–176.7 ( 6)
MO, 2.28–2.43 (1) ( 6), av. 2.35
t, , 6 MO, 1.68–1.72 (1) (t), av. 1.70 88.9–90.9, av. 90.0; 80
MO, 1.87–2.03 (2) ( ), av. 1.93, and 178.2–179.8 ( 6)
MO, 2.27–2.37 (2) ( 6), av. 2.33
4 PbO, 2.38 (av.) ( 4) – 144
TaO, 1.929, 1.930 (9) ( ) 114.3 85
, 3 TaO, 1.977–2.141 (10) ( 3) Ta3O, 98.3–145.4 85
av. 2.065,
TaO, 1.912–2.018 (9) ( )
av. 1.937
Ta2O, 106.7–140.0
, 3 TaO, 2.031–2.098 (12) ( 3) Ta3O, 107.4–111.1 145
av. 2.055
TaO, 1.836–2.017 (15) ( )
av. 1.926
Ta2O, 144.3–145.9
, 3 TaO, 1.89–2.39 (2), ( 3) Ta3O, 81.5–143.7 145
av. 2.09
TaO, 1.82–2.03 (2), ( )
av. 1.92
Ta2O, 101.2–111.7
, 3 TaO, 2.01 (1) av. ( 3) Ta2O, 175.3 23
4(Zn) ZnO,2.10(1)av.( 3)
TaO, 1.90 (1) av. ( )