Cyclo-Tetra-μ-fluorido-1:2κ2F;2:3κ2 F;3:4κ2 F;1:4κ2 F-octanitrato- 1κ8 O,O′;3κ8 O,O′-tetrakis-(1,10- phenanthroline)-2κ4 N,N′;4κ4 N,N′-2,4-dichromium(III)-1,3-dineodymium(III) methanol tetra-solvate monohydrate

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In the title compound, [Cr2Nd2F4(NO 2)8(C12H8N2) 4]·4CH3OH·H2O, two cis-difluoridobis(1,10-phenanthroline)chromium(III) fragments containing octa-hedrally coordinated chromium(III) bridge via fluoride ions to two tetra-nitratoneodymate(III) fragments, forming an uncharged tetra-nuclear square-like core. The fluoride bridges are fairly linear, with Cr - F - Nd angles of 168.74 (8)°. Cr - F bond lengths are 1.8815 (15) Å, slightly elongated compared to those of the parent chromium(III) complex, which has bond lengths ranging from 1.8444 (10) to 1.8621 (10) Å. The tetra-nuclear complex is centered at a fourfold rotoinversion axis, with the Cr and Nd atoms situated on two perpendicular twofold rotation axes. The uncoordinated water molecule resides on a fourfold rotation axis. The four methanol solvent molecules are located around this axis, forming a cyclic hydrogen-bonded arrangement. The title compound is the first structurally characterized example of unsupported fluoride bridges between lanthanide and transition metal ions.

Original languageEnglish
JournalActa Crystallographica Section E: Structure Reports Online
Volume67
Issue number11
Pages (from-to)m1561-m1562
ISSN1600-5368
DOIs
Publication statusPublished - 1 Nov 2011

ID: 240002976