Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/28772
Title: Ligand effect on the structures and acidities of [TpOs(H2)(PPh3)2]BF4 and [CpOsH2(PR3)2]BF4
Authors: Ng, WS
Jia, G
Hung, MY
Lau, CP
Wong, KY 
Wen, L
Issue Date: 1998
Publisher: American Chemical Society
Source: Organometallics, 1998, v. 17, no. 21, p. 4556-4561 How to cite?
Journal: Organometallics 
Abstract: The new molecular dihydrogen complex [TpOs(H2)(PPh3)2]BF4 was prepared by protonation of TpOsH(PPh3)2 with HBF4. The pseudo-aqueous pKa values of [CpOsH2(PR3)2)IBF4 ((PRs)2 = (PPh3)2, dppm, dppe, dppp) and [TpOs(H2)(PPh3)2]BF4 have been determined in dichloromethane. [TpOs(H2)(PPh3)2]BF4 was found to be more acidic than trans-[CpOsH2(PPh3)2]-BF4. While [TpOs(H2)(PPh3)2]BF4 is less acidic than [TpRu(H2)(PPh3)2]BF4 by 1.3 pKa units, trans-[CpOsH2(PPh3)2]BF4 is less acidic than trans-[CpRuH2(PPh3)2]BF4 by 5.1 pKa units.
URI: http://hdl.handle.net/10397/28772
ISSN: 0276-7333
EISSN: 1520-6041
DOI: 10.1021/om9804071
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