The crystal and molecular structure of bis(diacetamide)(perchlorato)sodium(I)

✍ Scribed by P.S. Gentile; J.G. White; D.D. Cavalluzzo

• Publisher: Elsevier Science
• Year: 1976
• Tongue: English
• Weight: 482 KB
• Volume: 18
• Category: Article
• ISSN: 0020-1693
• DOI: 10.1016/s0020-1693(00)95601-9

✦ Synopsis

The structure of bis(diacetamide) (perchlorato) sodium(I), Na[(CH,CONHCOCHJ)zCl,O,l has been determined from three dimensional X-ray diffraction data using monochromatic CuK, radiation. The unit cell is monoclinic, space group P2Jc, having dimensions a = 7.529(3)4 b = 20.69(2)& c = 10.974 (5)i$ p = 122.4(l)", and Z = 4. The intensity data were collected on an Enraf-Nonius CAD-4 automated diffractometer. The structure was determined by the heavy atom method and refined anisotropically by block diagonal least squares to a conventional unweighted R factor of 0.078.

The compound is a dimer, each sodium being bonded to six oxygens, one from the perchlorate ion and the other five from the diacetamides, two of which form bridges between the sodium atoms. The dimers form infinite chains along the [OOl] direction. The units of the chain are held together by hydrogen bonds between an amide group and a perchlorato oxygen. Sodium-oxygen bond distances fall within the range 2.31-2.51 I%. It is believed that this is the first reported structure in which perchlorate is coordinated to a nontransition metal.