Journal of The Chemical Society-dalton Transactions, 1998
The complexes [RuTp(Cl)(PPr i 2 Me) 2 ] 1 and [RuTp(Cl)(PEt 3 ) 2 ] 2 were prepared by thermal di... more The complexes [RuTp(Cl)(PPr i 2 Me) 2 ] 1 and [RuTp(Cl)(PEt 3 ) 2 ] 2 were prepared by thermal displacement of PPh 3 from [RuTp(Cl)(PPh 3 ) 2 ] by the corresponding phosphine. A series of cationic complexes of the type [RuTp(L)-(PR 3 ) 2 ] ϩ (L = H 2 O, N 2 or CNBu t ; PR 3 = PPr i 2 Me or PEt 3 ) was obtained by chloride abstraction from 1 or 2 in the presence of L. As consequence of the steric crowding, one of the PPr i 2 Me ligands in 1 is labile, and it was readily replaced by neutral molecules such as MeCN or CNBu t to yield the neutral complexes [RuTp(Cl)L(PPr i 2 Me)] (L = MeCN or CNBu t ). The monohydrides [RuTp(H)(PPr i 2 Me) 2 ] and [RuTp(H)(PEt 3 ) 2 ] were obtained by treatment of 1 or 2 with NaBH 4 in MeOH. Protonation of these monohydrides led to the cationic dihydrogen complexes [RuTp(H 2 )(PPr i 2 Me) 2 ] ϩ and [RuTp(H 2 )(PEt 3 ) 2 ] ϩ which were isolated as [BPh 4 ] Ϫ salts, and characterized by determination of their (T 1 ) min and 1 J HD coupling constants in the corresponding isotopomers. The neutral hydride(dihydrogen) complex [RuTp(H)(H 2 )(PPr i 2 Me)], which resulted from the reaction of [RuTp(Cl)(MeCN)-(PPr i 2 Me)] with NaBH 4 in MeOH, was characterized in analogous fashion. The crystal structures of the complexes [RuTp(H 2 O)(PPr i 2 Me) 2 ][CF 3 SO 3 ]ؒEtOH and [RuTp(N 2 )(PEt 3 ) 2 ][BPh 4 ] were determined.
A series of cationic vinylidene complexes of the type [TpRudCdCHR(PR 3 ) 2 ][BPh 4 ] (Tp ) hydrot... more A series of cationic vinylidene complexes of the type [TpRudCdCHR(PR 3 ) 2 ][BPh 4 ] (Tp ) hydrotris(pyrazolyl)borate; PR 3 ) PEt 3 , PMe i Pr 2 ; R ) Ph, Bu t , COOMe) have been prepared. The reaction of [TpRudCdCHCOOMe(PEt 3 ) 2 ][BPh 4 ] with a further HCtCCOOMe molecule yields the E-stereoisomer of the vinylvinylidene derivative [TpRudCdC(COOMe)CHd CHCOOMe(PEt 3 ) 2 ][BPh 4
Hay tres clases de movimientos observables: los faciales, los gesticulares y los de postura. Aunq... more Hay tres clases de movimientos observables: los faciales, los gesticulares y los de postura. Aunque podamos categorizar estos tipos de movimientos, la verdad es que están fuertemente entrelazados, y muy frecuentemente se hace difícil dar un significado a uno, prescindiendo de los otros.
Journal of The Chemical Society-dalton Transactions, 1998
The complexes [RuTp(Cl)(PPr i 2 Me) 2 ] 1 and [RuTp(Cl)(PEt 3 ) 2 ] 2 were prepared by thermal di... more The complexes [RuTp(Cl)(PPr i 2 Me) 2 ] 1 and [RuTp(Cl)(PEt 3 ) 2 ] 2 were prepared by thermal displacement of PPh 3 from [RuTp(Cl)(PPh 3 ) 2 ] by the corresponding phosphine. A series of cationic complexes of the type [RuTp(L)-(PR 3 ) 2 ] ϩ (L = H 2 O, N 2 or CNBu t ; PR 3 = PPr i 2 Me or PEt 3 ) was obtained by chloride abstraction from 1 or 2 in the presence of L. As consequence of the steric crowding, one of the PPr i 2 Me ligands in 1 is labile, and it was readily replaced by neutral molecules such as MeCN or CNBu t to yield the neutral complexes [RuTp(Cl)L(PPr i 2 Me)] (L = MeCN or CNBu t ). The monohydrides [RuTp(H)(PPr i 2 Me) 2 ] and [RuTp(H)(PEt 3 ) 2 ] were obtained by treatment of 1 or 2 with NaBH 4 in MeOH. Protonation of these monohydrides led to the cationic dihydrogen complexes [RuTp(H 2 )(PPr i 2 Me) 2 ] ϩ and [RuTp(H 2 )(PEt 3 ) 2 ] ϩ which were isolated as [BPh 4 ] Ϫ salts, and characterized by determination of their (T 1 ) min and 1 J HD coupling constants in the corresponding isotopomers. The neutral hydride(dihydrogen) complex [RuTp(H)(H 2 )(PPr i 2 Me)], which resulted from the reaction of [RuTp(Cl)(MeCN)-(PPr i 2 Me)] with NaBH 4 in MeOH, was characterized in analogous fashion. The crystal structures of the complexes [RuTp(H 2 O)(PPr i 2 Me) 2 ][CF 3 SO 3 ]ؒEtOH and [RuTp(N 2 )(PEt 3 ) 2 ][BPh 4 ] were determined.
A series of cationic vinylidene complexes of the type [TpRudCdCHR(PR 3 ) 2 ][BPh 4 ] (Tp ) hydrot... more A series of cationic vinylidene complexes of the type [TpRudCdCHR(PR 3 ) 2 ][BPh 4 ] (Tp ) hydrotris(pyrazolyl)borate; PR 3 ) PEt 3 , PMe i Pr 2 ; R ) Ph, Bu t , COOMe) have been prepared. The reaction of [TpRudCdCHCOOMe(PEt 3 ) 2 ][BPh 4 ] with a further HCtCCOOMe molecule yields the E-stereoisomer of the vinylvinylidene derivative [TpRudCdC(COOMe)CHd CHCOOMe(PEt 3 ) 2 ][BPh 4
Hay tres clases de movimientos observables: los faciales, los gesticulares y los de postura. Aunq... more Hay tres clases de movimientos observables: los faciales, los gesticulares y los de postura. Aunque podamos categorizar estos tipos de movimientos, la verdad es que están fuertemente entrelazados, y muy frecuentemente se hace difícil dar un significado a uno, prescindiendo de los otros.
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