ISSN:
0044-2313
Keywords:
Polyolato-copper complex
;
Deprotonated methyl β-D-xylopyranoside
;
Crystal structure
;
Hydrogen bond structure
;
Homodromic helix
;
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Description / Table of Contents:
Polyol Metal Complexes. VIII. R,R-trans-Diaminocyclohexane-κN,N′ Methyl-β-D-xylopyranosid-2,3-ato-κO2,O3 Aqua Copper Dihydrate, [(R,R-chxn)(H2O)Cu(Me-β-D-Xylp2,3 H-2)] · 2 H2O, - a Copper Complex with a Twofold Deprotonated Xylose Derivative as a LigandMethyl β-D-xylopyranoside forms a chelate complex with copper(II) ions in aqueous, alkaline solution after deprotonation at O-2 and O-3. In the blue crystals, CuII is further coordinated by R,R-trans-1,2-diaminocyclohexane and water; P21, a = 982.9(3), b = 705.8(5), c = 1 292.1(6) pm, β = 96.74(4)°, V = 890.2(8) · 106 pm3. The alkoxide-O-atoms act as acceptors in a hydrogen bond system, a typical feature of which is a homodromic helix of water molecules.
Notes:
Methyl-β-D-xylopyranosid bildet in wäßrig-alkalischer Lösung einen Chelatkomplex mit Kupfer(II), in dem es an O-2 und O-3 deprotoniert als Diolat-Ligand vorliegt. In den blauen Kristallen ist CuII außerdem von R,R-trans-1,2-Diaminocyclohexan und Wasser koordiniert; P21, a = 982,9(3), b = 705,8(5), c = 1 292,1(6) pm, β = 96,74(4)°, V = 890,2(8) · 106 pm3. Die Alkoxid-O-Atome sind Akzeptoren in einem Wasserstoffbrückenbindungssystem, dessen auffälliges Merkmal eine homodrome Schraube von Wassermolekülen ist.
Additional Material:
4 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/zaac.19946200923
