中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
二氯-(2,2,6,6-四甲基哌啶-1-基)硼烷 | dichloro-(2,2,6,6,-tetramethylpiperidino)borane | 79855-29-1 | C9H18BCl2N | 221.966 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
二氯-(2,2,6,6-四甲基哌啶-1-基)硼烷 | dichloro-(2,2,6,6,-tetramethylpiperidino)borane | 79855-29-1 | C9H18BCl2N | 221.966 |
—— | (2,2,6,6-tetramethylpiperidino)bordifluoride | 103547-63-3 | C9H18BF2N | 189.056 |
2,2,6,6-Tetramethylpiperidino-tert-butylimino borane, 1a, and 2,2,6,6-tetramethyl-piperidino-2,6- diisopropylphenylimino borane (1b), react with the trichlorides of Al, Ga and In or with AlBr3 to 1:1 to give the addition products tmp=B=N(ECl3)tBu (E = Ga (2a), In (2b) and tmp = B = N(EHal3)(C6H3,2,6-iPr2), (E = Al, Hal = Cl, (2c), E = Al, Hal = Br (2d)). E = Ga, Hal = Cl (2e). All these compounds have an allene type structure with short BN bonds as shown by the determination of the crystal structures of 2a, b. NMR data are in accord with this structure. No isomerization to tmp-BHal-NR-EHal2 has been observed at temperatures up to their melting points
The aminoiminoborane tmp-B=NCMe3 (1) adds to TiBr4 or ZrCl4 in a 1:1 ratio while PdCl2 adds 1 in a 1:2 ratio. In these new compounds the NBN unit is almost linear and the configuration corresponds to an allene. On the other hand 1 and Ti(OR)4 compounds and Ti(NMe2)4 give N metallated diaminoboranes tmp-B(X)-NCMe3EX3 (X = OR, NMe2). Mixed compounds Ti(OR)3-nXn lead to diaminoboranes with BOR groups while the TiCl bond inserts into the B = N bond of 1 to produce tmp-BNMe2-NCMe3TiCl3. Hydrolysis of this compound leads to a spirocyclic dititanoxane with a short linear Ti-O-Ti bond and pentacoordinated Ti centers carrying two Cl atoms each. Spirocycles with a BN2E (E = Ti, Nb, Ta, Pd) unit are formed when 1 is allowed to react with TiCl4, NbCl5, TaCl5 and PdCl2. The palladium compound 16 is dimeric, and dimerization occurs via Pd-Cl bridges.
The aminoiminoborane tmp-B=NC6H3-2,6-iPr2 reacts with the titanium compounds in the same manner as 1, however without formation of spirocycles.