| | 1 | Author
| Henry Strasdeit, Bernt Krebs, G. Henkel | Requires cookie* | | | Title
| [Fe 6 Se 9 (SR) 2 ] 4 ' Clusters (R = Me, CH 2 Ph): Synthesis and Characterization, and the X-Ray Structure of (PhCH 2 NEt3)4[Fe 6 Se 9 (SMe)2]  | | | | Abstract
| The compounds (PhCH 2 NEt 3) 4 [Fe 6 Se 9 (SMe) 2 ] (1) and (Et 4 N) 4 [Fe 6 Se 9 (SCH 2 Ph) 2 ] (2) have been isolated in good yields from Fe(SR) 3 (R = Me, CH 2 Ph)/"Na 2 Se 2 " reaction mixtures in methanol/N,N-dimethylformamide after addition of the appropriate tetraalkylammonium chlorides. 1 is monoclinic, space group P2]/c, Z = 4, with a = 18.697(14), b -22.606(16), c = 15.989(11) Ä, and/3 = 94.15(6)° at 140 K. Its structure has been refined to R (R w) -0.092 (0.075). The [Fe 6 Se 9 (SMe) 2 ] 4_ anion contains six coplanar iron atoms which are present in distorted tetrahedral Se 4 and Se 3 (SMe) ligand surroundings. The Se atoms are n, and fi 4 bridging. The four central Fe atoms and the Se atoms constitute a Fe 4 Se 9 group that is structurally related to 4[Fe 2 Se 3 ] 2_ double tetrahedral chains and 2 [FeSe] layers. The Fe atoms in the [Fe 6 Se 9 (SMe) 2 ] 4 ~ cluster are antiferromagnetically coupled. 1 has a room-temperature magnetic moment of 1.22 ,M B /Fe. Cyclic voltammograms, and electronic, infrared, and proton resonance spectra of 1 and 2 have been measured. | | | |
Reference
| Z. Naturforsch. 42b, 565—572 (1987); received December 1 1986 | | | |
Published
| 1987 | | | |
Keywords
| Hexanuclear Fe/Se/SR Complexes, Synthesis, X-Ray, Magnetic and Electrochemical Properties | | | |
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| ZNB-1987-42b-0565 | | | | Volume
| 42 | |
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