A Triple-Decked Sandwich Complex of Rhodium with 1,4-Diborabenzene as Bridging Ligand

✍ Scribed by Prof. Dr. Gerhard E. Herberich; Dr. Bernd Hessner; Prof. Dr. Gottfried Huttner; Dipl.-Chem. Laszlo Zsolnai

• Publisher: John Wiley and Sons
• Year: 1981
• Tongue: English
• Weight: 213 KB
• Volume: 20
• Category: Article
• ISSN: 0044-8249
• DOI: 10.1002/anie.198104721

✦ Synopsis

lowed to stand at this temperature for one week; the color of the solution turned from green to red. The mixture was subjected to low-temperature chromatography ( -20 "C, Merck silica gel 60; 0.040-0.63 mm, CHC13/acetone 1 : 1, 30 x 2.5 cm). Two zones were eluted: the first (green) zone, was unreacted (I), the second (red) zone was (3); yield 44 mg, 30% based on ( I ) .

(4) is prepared analogously, but completion of reaction requires eight weeks (220 V, 70 A; yield 5-8%).

The red-brown crystals of (3) and of (4) are stable in an inert atmosphere for a few days or a few hours at -78 "C, respectively, at room temperature for a matter of a few minutes. (3) is soluble in CH2C12 and in polar solvents, (4) in ether and in polar solvents. The solutions of (3) and (4) decompose within a few minutes at room temperature.