Abstract
The new molecular dihydrogen complex [TpOs(H2)(PPh3)2]BF4was prepared by protonation of TpOsH(PPh3)2with HBF4. The pseudo-aqueous pKavalues of [CpOsH2(PR3)2)IBF4((PRs)2= (PPh3)2, dppm, dppe, dppp) and [TpOs(H2)(PPh3)2]BF4have been determined in dichloromethane. [TpOs(H2)(PPh3)2]BF4was found to be more acidic than trans-[CpOsH2(PPh3)2]-BF4. While [TpOs(H2)(PPh3)2]BF4is less acidic than [TpRu(H2)(PPh3)2]BF4by 1.3 pKaunits, trans-[CpOsH2(PPh3)2]BF4is less acidic than trans-[CpRuH2(PPh3)2]BF4by 5.1 pKaunits.
Original language | English |
---|---|
Pages (from-to) | 4556-4561 |
Number of pages | 6 |
Journal | Organometallics |
Volume | 17 |
Issue number | 21 |
Publication status | Published - 12 Oct 1998 |
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Organic Chemistry
- Inorganic Chemistry