METAL ALKYL AND METAL ARYL COMPOUNDS .48. MONOMERIC, TETRAMERIC, AND POLYMERIC SODIUM FLUORENIDE.S[S = ME2N(CH2)2N(ME)(CH2)2NME2, ME2N(CH2)NNME2 (N = 2, 3)]

被引：42

作者：

CORBELIN, S ^{[1
]}

KOPF, J ^{[1
]}

WEISS, E ^{[1
]}

机构：

[1] UNIV HAMBURG,INST ANORGAN & ANGEW CHEM,MARTIN LUTHER KING PLATZ 6,W-2000 HAMBURG 13,GERMANY

来源：

CHEMISCHE BERICHTE | 1991年 / 124卷 / 11期

关键词：

ORGANOSODIUM COMPOUNDS; FLUORENIDE CARBANIONS; SOLVATION EFFECTS;

D O I：

10.1002/cber.19911241107

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The metallation of fluorene with sodium butanide (NanBu) in the presence of N bases yields solvated sodium fluorenide. Base adducts with bi- and tridentate N-chelating ligands have been isolated: Na(fluorenide)(pmdta) (1) [PMDTA = Me2N(CH2)2N(Me)(CH2)2NMe2], [Na(fluorenide)(tmeda)]n (2) [TMEDA = Me2N(CH2)2NMe2], [Na(fluorenide)(tmpda)]4 (3) [TMPDA = Me2N(CH2)3NMe2]. According to X-ray diffraction studies monomeric (1), polymeric (2), and cyclic-tetrameric (3) structures are present in the crystal. These pronounced structural variations are explained on the basis of ionic contact aggregates where together with coulomb interactions the steric requirements of the ligands become rather important. Contact distances between Na ions and several C atoms of the carbanion may vary (ca. 260-300 pm) and definite coordination numbers become meaningless.

引用

页码：2417 / 2422

页数：6

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