Rhodium (Chief Bee) 11-17-02 18:04 No 380497 |
Catalytic hydrogenation at STP with Ni(OAc)2-NaBH4 (Rated as: excellent) |
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The addition of sodium borohydride to an aqueous solution of Nickel(II)Acetate forms a precipitate of Nickel Boride (Ni2B, P-1 Nickel) which is at least as active as Raney Nickel for catalytic hydrogenation at 1 atm. Catalytic Hydrogenation. V. The Reaction of Sodium Borohydride with Aqueous Nickel Salts. P-1 Nickel Boride, a Convenient, Highly Active Nickel Hydrogenation Catalyst Charles Allan Brown J. Org. Chem. 56, 1900-1904 (1970) (../rhodium/pdf /nickel.borid Abstract The reaction of sodium borohydride with aqueous solutions of nickel salts immediately produces a finely divided black precipitate. This material (P-1 nickel) is a highly active catalyst for atmospheric pressure hydrogenations, more active than Raney nickel. The hydrogenations of a variety of alkenes have been examined and all but the most hindered double bonds were reduced successfully. Certain dienes were reduced cleanly to single olefinic products. P-1 nickel has marked advantages over Raney nickel: it is not pyrophoric; it is readily prepared in situ; it is highly reproducible. |
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Barium (Hive Bee) 11-18-02 15:07 No 380674 |
Chem. Rev. 1986, 86, 763-780 Synthetically useful (Rated as: excellent) |
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Synthetically useful reactions with metal boride and aluminide catalysts Chem. Rev. 86, 763-780 (1986) (../rhodium/pdf /metal.boride This paper covers:
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Rhodium (Chief Bee) 11-18-02 19:29 No 380780 |
Ref uploaded | Bookmark | ||||||
Great! I have uploaded that one to my page and linked it from your post. |
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Barium (Hive Bee) 11-19-02 17:24 No 381219 |
Hmm | Bookmark | ||||||
I made som P1-Ni2B today just to see how active it was with a couple of my standard hydrogen donors. with aq. sodium hypophosphite - very active at room temp with MeOH/sodium hypophosphite - very active at room temp with aq ammonium formate - active at room temp, very active at 50°C with MeOH/ammonium formate - active at room temp, very active at 50°C Now it is time to reduce something Catalytic hydrogenation freak |
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Sunlight (Pioneer Researcher) 11-19-02 22:59 No 381312 |
Nice Barium | Bookmark | ||||||
Perhaps we could check it in the CTH reductive amination. Could you detail the preparation of the catalyst ? |
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Rhodium (Chief Bee) 11-20-02 00:23 No 381352 |
The preparation is available in the first post in ... | Bookmark | ||||||
The preparation is available in the first post in this thread. |
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Sunlight (Pioneer Researcher) 11-20-02 15:01 No 381573 |
Ok | Bookmark | ||||||
So stupid... I have NiCl2, and there's something about bad effects of Cl and Na ions in the catalyst, it's a complication. |
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Aurelius (Hive Bee) 11-21-02 22:14 No 381939 |
Example | Bookmark | ||||||
hey Barium, could you put a write up on your procedure for the reduction of (your choice) a compound including catalyst prep? |
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Rhodium (Chief Bee) 11-21-02 22:18 No 381941 |
He's done that before, just perform a search on ... | Bookmark | ||||||
He's done that before, just perform a search on his name. |
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Aurelius (Hive Bee) 11-22-02 00:42 No 381971 |
Thank | Bookmark | ||||||
must have missed it |
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