Acta Crystallographica Section C

Crystal Structure Communications

Volume 69, Part 12 (December 2013)

metal-organic compounds

Acta Cryst. (2013). C69, 1488-1493    [ doi:10.1107/S0108270113030163 ]

The coordination chemistry of two symmetric fluorene-based organic ligands with cuprous chloride

Y.-F. Liu, C.-W. Zhao, J.-P. Ma, Q.-K. Liu and Y.-B. Dong

Abstract: Two novel symmetric fluorene-based ligands, namely, 2,7-bis­(1H-imidazol-1-yl)-9,9-dimethyl-9H-fluorene [L1 or (I), C21H18N4] and 2,7-bis­(1H-imidazol-1-yl)-9,9-dipropyl-9H-fluorene (L2), have been used to construct the coordination polymers catena-poly[[di­chlorido­dicopper(I)(Cu-Cu)]-[mu]-2,7-bis­(1H-imid­azol-1-yl)-9,9-dimethyl-9H-fluorene], [Cu2Cl2(C21H18N4)]n, (II), and catena-poly[[tetra-[mu]2-chlorido-tetra­copper(I)]-bis­[[mu]-2,7-bis­(1H-imidazol-1-yl)-9,9-dipropyl-9H-fluorene]], [Cu4Cl4(C25H26N4)2]n, (III). There are three types of C-H...N hydrogen bonds in (I), resulting a two-dimensional network in the ab plane, including a chiral helical chain along the b axis. Compounds (II) and (III) are related one-dimensional polymers. In both, CuI atoms connect the symmetric ligands (L1 or L2) into a one-dimensional chain. In (II), the {[CuICl2]-} unit, acting as a co-anion, adheres to the one-dimensional chain through a weak Cu...Cu inter­action. However, in (III), the {[CuI2Cl4]2-} unit links two different chains into a one-dimensional rope-ladder-type chain. In addition, there are C-H...Cl hydrogen bonds and [pi]-[pi] inter­actions in the extended structures of (II) and (III), the difference is that the chains in (II) are linked into a two-dimensional network while the chains in (III) are stacked into a three-dimensional framework.

CCDC references: 969907, 969908 and 969909

Formula: C21H18N4, [Cu2Cl2(C21H18N4)] and [Cu2Cl2(C25H26N4)]

Keywords: crystal structure; fluorene-based ligands; copper(I) complexes; coordination polymers.

hkldisplay filedownload file

Structure factor file (CIF format) (80.4 kbytes)
[ doi:10.1107/S0108270113030163/sf3208Isup2.hkl ]
Contains datablock I

hkldisplay filedownload file

Structure factor file (CIF format) (187.8 kbytes)
[ doi:10.1107/S0108270113030163/sf3208IIsup3.hkl ]
Contains datablock II

hkldisplay filedownload file

Structure factor file (CIF format) (228.7 kbytes)
[ doi:10.1107/S0108270113030163/sf3208IIIsup4.hkl ]
Contains datablock III


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