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| Acronym | Definition |
|---|---|
| PPT | Parts Per Trillion |
| PPT | Parts Per Thousand |
| PPT | Power Point File format/extension (Microsoft) |
| PPT | Precipitate (chemistry) |
| PPT | Percentage Points (financial reports) |
| PPT | Postponed (baseball) |
| PPT | Personal Property Tax |
| PPT | Pedagogisk Psykologisk Tjeneste (Norwegian: Educational and Psychological Service) |
| PPT | Partners in Pediatrics |
| PPT | Periodismo Para Todos (Argentinian TV program) |
| PPT | Patria Para Todos (Homeland for All, political party) |
| PPT | Putting the Pieces Together |
| PPT | Public Policy Team (various organizations) |
| PPT | Positive Psychotherapy |
| PPT | Plunge Protection Team (nickname; Working Group on Financial Markets) |
| PPT | Pressure Pain Threshold |
| PPT | Pulsed Plasma Thruster |
| PPT | Program Planning Team |
| PPT | Posterior Pelvic Tilt |
| PPT | Pre-Paid Tuition (various locations) |
| PPT | Paper and Pencil Test (various organizations) |
| PPT | Professional Poker Tour |
| PPT | Pre-Production Test |
| PPT | Personal Protective Technology (US CDC) |
| PPT | Probabilistic Polynomial Time |
| PPT | Personal Productivity Tool (usually meaning a personal computer) |
| PPT | Printing and Publishing Technology |
| PPT | Power Point |
| PPT | Program Properties Table |
| PPT | Processing Program Table |
| PPT | Precision Pressure Transducer |
| PPT | Pay-Per-Transaction |
| PPT | Powered Pallet Truck |
| PPT | President Pro Tempore |
| PPT | Permanent People's Tribunal (various locations) |
| PPT | Presidential Prayer Team |
| PPT | Process Project Teams |
| PPT | Peak Power Tracker |
| PPT | Primitive Pythagorean Triple (ordered triple of relatively prime integers that satisfy the Pythagorean theorem) |
| PPT | Planned Parenthood of Toronto |
| PPT | Public Pay Telephone |
| PPT | Program Properties Table (MVS Operating System) |
| PPT | Program Performance Test |
| PPT | Pacific Play Tent |
| PPT | People's Party of Timor (East Timor) |
| PPT | Pacific Prevailing Time |
| PPT | Paid Part-Timer |
| PPT | Positive Partial Transpose |
| PPT | Prentiss Properties Trust (real estate investement trust; various locations) |
| PPT | Propagation Prediction Tool |
| PPT | Processing Program Table (CICS) |
| PPT | Package Peak Temperature |
| PPT | Pink Poogle Toy (website) |
| PPT | Precision Position Tracker (optical tracking system used in virtual reality) |
| PPT | Princess Peach Toadstool (Mario Games) |
| PPT | Planning & Placement Team |
| PPT | Punkter Per Tomme (Norwegian: Dots Per Inch) |
| PPT | Program Processing Table |
| PPT | Proprietary Push Technology (computing) |
| PPT | Performance Price Tradeoff (government contracts) |
| PPT | Pupil Personnel Team |
| PPT | Pulse Pair Timing |
| PPT | Precision Pad Technology |
| PPT | Personally Procured Transportation |
| PPT | Permeability Plugging Tester (drilling industry) |
| PPT | Post Production Test |
| PPT | Production Prove-out Test |
| PPT | Partners for Public Transportation |
| PPT | Principles and Parameter Theory |
| PPT | Physical Prototyping Team |
| PPT | Product Positioning Time |
| PPT | Pass Prediction Table |
| PPT | Partial Prothrombine Time |
| PPT | Papeete, French Polynesia - International Tahiti-Faaa (Airport Code) |
| PPT | Petroleum Profit Tax Act of 1959 (Nigeria) |
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| Names | |
|---|---|
| IUPAC name | |
| Other names pyridinium p-toluenesulfonate | |
| Identifiers | |
| |
| Abbreviations | PPTS |
| ChemSpider | |
| ECHA InfoCard | |
PubChemCID | |
CompTox Dashboard(EPA) | |
| |
| |
| Properties | |
| C12H13NO3S | |
| Molar mass | 251.30 g·mol−1 |
| Appearance | Colourless solid |
| Melting point | 120 °C (248 °F; 393 K) source[2] |
| Acidity (pKa) | 5.21[1] |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
| verify (what is ?) | |
| Infobox references | |
Pyridinium p-toluenesulfonate (PPTS) is a salt of pyridine and p-toluenesulfonic acid. It is a colourless solid.
Uses[edit]
In organic synthesis, PPTS is used as a weakly acidic catalyst, providing an organic soluble source of pyridinium (C5H5NH+) ions. For example, PPTS is used to deprotect silyl ethers or tetrahydropyranyl ethers when a substrate is unstable to stronger acid catalysts. It is also a commonly used catalyst for the preparation of acetals and ketals from aldehydes and ketones.
References[edit]
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Pptsonline.com
- ^David A. Evans (2005-11-04). 'Evans pKa Table'(PDF). Retrieved 2016-03-02.
- ^TOKYO CHEMICAL INDUSTRY CO., LTD. 'Pyridinium p-Toluenesulfonate'. Retrieved 2011-09-16.