Rectangular tetragadolinium complex ion with a ground S=27/2 state containing bis(dimethylglyoximato)copper(II) as a ferrimagnetic exchange coupler
✍ Scribed by Yasuko Kobayashi; Sohei Ueki; Takayuki Ishida; Takashi Nogami
- Publisher
- Elsevier Science
- Year
- 2003
- Tongue
- English
- Weight
- 229 KB
- Volume
- 378
- Category
- Article
- ISSN
- 0009-2614
No coin nor oath required. For personal study only.
✦ Synopsis
Pentanuclear [Cu(dmg) 2 {Gd(hfac) 2 } 4 (AcO) 4 ](Ph 4 P) 2 (1) (dmg ¼ dimethylglyoximate dianion; hfac ¼ 1,1,1,5,5,5hexafluoropentane-2,4-dionate) containing a central copper(II) and four peripheral gadolinium(III) ions was prepared and the crystal structure was determined by X-ray diffraction. Magnetic measurements on 1 revealed high ground spin multiplicity, as expected regardless of the sign of magnetic CuÁ Á ÁGd coupling through N-O bridges. The ground state was suggested to be S total ¼ 27=2 with the exchange parameter 2J =k B ¼ À2:9ð2Þ K between the Gd and Cu ions. The antiferromagnetic coupling is operative owing to the largely distorted Gd-O-N-Cu bridges.