Fluorosulfates of Silver, Ruthenium, and Osmium
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FLUOROSULFATES OF SILVER, RUTHENIUM, AND OSMIUM by PATRICK CHEUNG SHING LEUNG B.Sc. (Hons.), The University of British Columbia, 1975 A THESIS SUBMITTED IN PARTIAL FULFILMENT OF THE REQUIREMENTS FOR THE DEGREE OF DOCTOR OF PHILOSOPHY in THE FACULTY OF GRADUATE STUDIES (Department of Chemistry) We accept this thesis as conforming to the required standard THE UNIVERSITY OF BRITISH COLUMBIA December, 1979 © Patrick Cheung Shing Leung, 1979 In presenting this thesis in partial fulfilment of the requirements f an advanced degree at the University of British Columbia, I agree tha the Library shall make it freely available for reference and study. I further agree that permission for extensive copying of this thesis for scholarly purposes may be granted by the Head of my Department or by his representatives. It is understood that copying or publication of this thesis for financial gain shall not be allowed without my written permission. Department of CMMUTtY The University of British Columbia 2075 Wesbrook Place Vancouver, Canada V6T 1W5 ABSTRACT A number of synthetic routes to silver(II) fluorosulfate, Ag(SC>3F)2, were systematically explored. The most suitable and versatile route was found to be the oxidation of silver metal by a solution of bisfluorosulfuryl peroxide, S20gF2, in fluorosulfuric acid, HSO^F, according to: HS03F Ag + S206F2 m- Ag (SC>3F) 2> Additional methods which were found to be suitable involved the oxidation of a wide variety of silver(I) compounds such as S F or the nsert:LOn of S0 Ag20 or AgSO^F by 2°6 2' i- 3 into AgF2. Structural conclusions on Ag(S03F)2 and the other compounds synthesized subsequently were based on the vibrational, elec• tronic and electron spin resonance spectra, as well as on magnetic susceptibility measurements made between 300 and 77 K. Ag(S0.jF)2 was found to be a true compound of divalent silver, 2 + with the Ag ions in either square planar or tetragonally elongated octahedral environment. The only other example of a binary silver(II) compound is AgF2. Several silver(II) fluorosulfate derivatives were prepared and characterized. The reactions of bromine(I) fluorosulfate with metallic silver and other silver(I) substrates resulted in a mixed valence complex Ag^Ag''"'''(SO^F)4 . Its potassium analogue r^AgCSO^F)^, as well as two hexakisfluorosulfato- metallate (IV) complexes AgPtIV (SO..F) , and AgSnIV (SO-.F) . , and 3 b j b the N-donor ligand complex [Agtbipy^l (SO^F^ (i-n which bipy = 2,2'-bipyridine) were also synthesized. The attempt to synthesize a silver(III) fluorosulfato complex by direct insertion of SO^ into CsAgF^ resulted in the fluorination S F and of SC>3, to give 2°6 2 CsAg(S03F)3. Finally, the solvolysi of Ag(S03F)2 in trifluoromethylsulfuric acid, HSO^CF^, allowed its conversion into AgtSO^CF^),,. The principal synthetic route, the oxidation of metal by S2°6F2 s°lur-i°ns in HSO^F, was found to be useful in the preparation of RutSO^F)^. Ruthenium was also found to form a number of anionic derivatives with the metal in the +3 or + + +4 oxidation state, as in M[Ru(SC>3F)4] with M = Cs , C102 ; + + M2[Ru(S03F)6J with M = Cs , K ; and Cs[Ru(S03F)g]. Two different forms of Os(S03F)3 were found. Initial oxidation of osmium metal with S2°gF2 yielded the bright green a-Os(S03F)3, which was converted to the light green 3-form on long standing in S9OfiF;?. - iv - TABLE OF CONTENTS Page ABSTRACT ii LIST OF TABLES xii LIST OF FIGURES xvi ACKNOWLEDGEMENTS xviii I. GENERAL INTRODUCTION 1 A. Introductory Remarks 1 B. The Fluorosulfate Radical And Its Anion.... 6 C. Synthetic Routes To Fluorosulfates 19 D. Vibrational Studies Of The Fluorosulfate Group 2 5 E. Transition Metal Fluorosulf ates 30 F. Structural Characterizations Of Transition Metal Fluorosulf ates 34 II. - EXPERIMENTAL 35 A. Apparatus 35 1. Pyrex vacuum line 35 2. Metal vacuum line. 36 3. Reactions vessels 37 4. HSO-jF distillation apparatus 44 5. HSO^CF^ distillation apparatus 44 6. Drybox 4 6 - v - Page 7. Miscellaneous 46 B. Instrumental Methods 47 1. -Infrared spectroscopy 47 2. Raman spectroscopy 50 3. Visible and ultraviolet spectroscopy.... 50 4. Magnetochemistry 51 5. Electron spin resonance spectroscopy.... 53 6. Mossbauer spectroscopy 53 7. Melting points 54 C. Chemicals 54 1. Commercial sources 54 2. Preparative reactions 57 D. Chemical Analyses 61 1. Elemental analyses 61 2. Oxidation states determinations 6 3 III. FLUOROSULFATES OF SILVER(II) 64 A. Introduction 64 B. Silver (II) Fluorosulfate 76 1. Introduction 76 2. Synthetic reactions 77 (a) Reactions with fluorosulfuryl peroxide 77 (b) Reactions with mixtures of HSO^ and S2°6F284 - vi - Page (c) The reaction of silver(II) fluoride and sulfur trioxide 85 (d) Reactions with bromine monofluoro- sulfate 86 (e) Discussion 88 3. Characterization of Ag(S03F)2 96 (a) Infrared spectra 96 (b) Electronic spectra 99 (c) Magnetic susceptibility measurements 104 (d) Electron spin resonance spectra Ill (e) Oxidation state determination 117 (f) Thermal decomposition 118 C. Coordination Complex Of Ag(S03F)2, [Ag(bipy)2] (S03F)2 119 1. Introduction 119 2. Synthesis of silver(II) bis(2,2'-bipy- ridyl) bis (fluorosulfate) 120 3. Characterizations 121 (a) Vibrational spectra 121 (b) Electronic spectra 126 (c) Magnetic susceptibility 128 (d) E.S.R. spectra 130 D. Anionic Fluorosulfato Complexes Of Silver(II) 132 1. Introduction 132 - vii - Page 2. Syntheses and elemental analyses 132 (a) Ag3(S03F)4 . 132 (b) K2[Ag(S03F)4] 132 3. Experimental results and discussions.... 135 (a) Infrared spectra 135 (b) Magnetic susceptibility measurements 135 (c) E.S.R. spectra 145 (d) Oxidation state determination and thermal decomposition of Ag3(S03F)4. 147 E. Silver(II) Hexakis(fluorosulfato)metallate(IV) 148 1. Introduction 148 2. Syntheses and elemental analyses 149 (a) AgPt(S03F)6 149 (b) AgSn(S03F)6 150 3. Characterizations 151 (a) Vibrational spectra . 151 (b) Electronic spectra 154 (c) Magnetic susceptibility measurements 156 (d) E.S.R. spectra 160 119 (e) Sn Mossbauer spectra of AgSn(S03F)g 162 F. Reactions Of Ag(S03F)2 164 1. Reaction of Ag(S03F)2 with elemental fluorine 164 - viii - Page (a) Introduction 164 (b) Conversion of Ag(S03F)2 into AgF2«.. 165 (c) Discussion 166 2. Reactions with some other halogens 167 (a) Chlorine 167 (b) Bromine 167 3. Reactions with chloryl fluorosulfate.... 169 4. Reaction with pyridine 171 5. Reaction with acetonitrile 172 6. Reaction with antimony pentafluoride.... 173 G. Attempts to obtain higher oxidation states of silver 175 S F 175 1. The reaction of AgO and 2°6 2 2. The reaction of CsAgF4 and S03 176 (a) Introduction 176 (b) Synthetic reactions 177 (c) Characterization of CsAg(S03F)3 179 IV. SILVER (II) TRIFLUOROMETHYLSULFATE 18 6 A. Introduction 18 6 B. Synthetic Reactions 188 1. Synthesis of silver(II) trifluoromethyl- sulfate 188 (a) Reaction of Ag(SO-jF)0 and HSO^CF-,... 188 - ix - Page (b) Other synthetic attempts 189 (c) Discussion 190 2. Conversion of Ag(S03CF3)2 into [Ag(bipy)2] (S03CF3)2 193 C. Experimental Result And Discussion 193 1. Infrared spectrum 193 2. Magnetic measurements 194 3. E.S.R. spectrum 198 4. Thermal decomposition 200 D. Conclusion 202 V. FLUOROSULFATES OF RUTHENIUM 203 A. Introduction 203 B. Ruthenium (III) Fluorosulfate 207 1. Preparation and elemental analysis 2 07 2. Experimental result and discussion .... 208 (a) Infrared spectra 208 (b) Magnetic susceptibilities 210 (c) Electronic spectra 213 (d) E.S.R. spectra 217 (e) Discussion 219 C. Anionic Fluorosulfato Complexes Of Ruthenium (III) 222 - x - Page 1. Introduction 222 2. Syntheses and elemental analyses 222 (a) Cl02[Ru(S03F)4] 222 (b) Cs[Ru(S03F)4] 223 (c) The attempted synthesis of Cs3 [Ru(S03F) ] 223 3. Characterizations 224 (a) Infrared spectra 224 (b) Magnetic susceptibilities 227 (c) E.S.R. spectra 227 D. Anionic Fluorosulfato Complexes of Ruthenium(IV) 229 1. Introduction 229 2. Preparations and elemental analyses 2 31 (a) K2 [Ru(S03F) ] 231 (b) Cs2 [Ru(S03F) ] 231 (c) Cs [Ru(S03F) ] 232 3. Characterizations 232 (a) Vibrational spectra 232 (b) Magnetic susceptibility measurements 233 (c) Electronic spectra 237 E. Other Synthetic Attempts 239 l.i. Reaction of S20gF2 with ruthenium metal. 239 2. Reaction of So0_F_ with Ru(SO_,F)_ 240 2 6 2 3 3 3. Reaction of BrS0oF with ruthenium metal. 24 0 - xi - Page 4. Reactions of Ru02 241 VI. OSMIUM (III) FLUOROSULFATE 242 A. Introduction 242 B. Synthetic Reactions And Elemental Analyses 1. Synthesis of Os (S03F) 245 2. Other synthetic attempts 246 3. Attempts to synthesize fluorosulfato complexes of osmium 247 C. Experimental Result And Discussion 248 1. Vibrational spectra 248 2. Magnetic susceptibility measurements.... 250 3. Electronic spectra 253 4. E.S.R. spectra 255 5. Conclusion 256 VII. GENERAL CONCLUSION 257 A. Summary 25 7 B. Suggestions For Further Work 258 BIBLIOGRAPHY 260 APPENDICES 277 - xii - LIST OF TABLES Table Page 1. Fundamental Frequencies Of Matrix Isoated SO-jF and Comparison With Other Results 9 2. Ligand Field Parameters For Some Nickel Salts... 16 3. Selected Parameters For F~ And S03F~ 18 S F and 4. Some Physical Properties Of HS03F, 2°6 2 BrS03F 24 5. Structural Bonding Differentiation For The S03F Group 2 6 6. Commercially Available Types Of Apparatus 48 7. Chemicals 55 8. Some Ionization Potentials Of Silver And Copper. 65 9. Synthetic Routes To Ag(S03F)2 92 10. Infrared Spectra Of Ag(S03F)2 And Related Compounds 98 11. Electronic Spectra Of Ag(S03F)2 And Related Compounds 102 12. Magnetic Susceptibilities And Magnetic Moments Of Ag (S03F) 106 13.