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Mono(dinitrogen) and Carbon Monoxide Adducts of
Bis(cyclopentadienyl) Titanium Sandwiches
Tamara E. Hanna, Emil Lobkovsky, and Paul J. Chirik*
J. Am. Chem. Soc. 2006, 128, 6018 - 6019
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Ti
R
R
Fe
R = SiMe2But
J. Am. Chem. Soc. 1998, 120, 10264
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J. Am. Chem. Soc. 2004, 126, 14688.
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Nature 2004, 427, 527.
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1: R = SiMe3
2: R = SiMe2Ph3: R = CHMe2
Ti
R
R
1 atm N2
- 45 oCTi N2
above - 45 oC
Ti
R
R
N2
R
R
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1: R = SiMe3
2: R = SiMe2Ph3: R = CHMe2
Ti
R
R
Ti N2
above - 45 oC
Ti
R
R
N2
R
R
1 atm N2- 35 oC
TiN2
R
R
N2
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Ti
R
R
Ti N2
- 35 oC
R
R
TiN2
R
R
N2
1 atm N2
- 60 oC
1: R = SiMe3
2: R = SiMe2Ph3: R = CHMe2
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Ti(1) – N(1) : 2.016(1) Å
N(1) – N(2) : 1.119(2) Å
Ti(1) – N(1) : 2.043(1) Å
N(1) – N(2) : 1.110(2) Å
J. Am. Chem. Soc. 2004, 126, 14688.
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J. Am. Chem. Soc. 2000, 122, 6476.
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Ti
R
R
TiCO
R
R
CO
1: R = SiMe3
2: R = SiMe2Ph3: R = CHMe2
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Ti(1) – C(10) : 1.9786(19) Å
C(10) – O(1) : 1.151(2) Å
Ti(1) – C(13) : 2.0065(18) Å
C(13) – O(1) : 1.150(2) Å
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TiCO
R
R
+ tBuNC TiCO
R
R
CNtBu
σ-donating, weakly π-acidic
N2
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