Universität zu Köln

Garg, Rishabh, Hegemann, Corinna and Mathur, Sanjay (2017). Heterobimetallic Alkoxides [(CdMV)-M-II(OiPr)(7)](2) (M = Nb, Ta) as Potential Precursors to Pyrochlore Cd2M2O7. Eur. J. Inorg. Chem. (28). S. 3383 - 3390. WEINHEIM: WILEY-V C H VERLAG GMBH. ISSN 1099-0682

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Abstract

Attempts to synthesize Cd-M (M = Nb, Ta) heterobimetallic complexes by salt metathesis reaction resulted in the unexpected structural motif [(I2Cd2MV)-M-II(OiPr)(7)](2) [M = Nb (2), Ta (3)]. Multinuclear NMR analysis revealed the coexistence of multiple products in solution. Donor solvents influenced the formation of different intermediate species in solution, as was proven by Cd-113 NMR spectroscopic data. The isolation of trimetallic [I2Cd{Ta(OiPr)(6)} K(HOiPr)(2)](4) (4) and the adduct [I2CdTa(OiPr)(5)-(thf)] (5) provided insight into the reaction mechanism. By exploiting the Lewis acidic nature of cadmium alkoxides, different compounds could be synthesized and thoroughly characterized by spectroscopic methods and single-crystal X-ray diffraction studies. Heterobimetallic compounds with the formula [(CdMV)-M-II( OiPr)(7)](2) [M = Nb (6), Ta (7)] produced pyrochlore phases from an amorphous ceramic homogenate, which indicates their potential as single-source precursors, as was confirmed by thermogravimetric/ differential thermal analysis, which showed that complexes 6 and 7 undergo facile two-step thermal decomposition at 600 degrees C to produce Cd2Nb2O7 and Cd2Ta2O7, respectively. Variable-temperature X-ray diffraction analysis of 6 additionally proved the formation of crystalline Cd2Nb2O7 phase.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Garg, Rishabh UNSPECIFIED UNSPECIFIED UNSPECIFIED Hegemann, Corinna UNSPECIFIED UNSPECIFIED UNSPECIFIED Mathur, Sanjay UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-222014
DOI:	10.1002/ejic.201700331
Journal or Publication Title:	Eur. J. Inorg. Chem.
Number:	28
Page Range:	S. 3383 - 3390
Date:	2017
Publisher:	WILEY-V C H VERLAG GMBH
Place of Publication:	WEINHEIM
ISSN:	1099-0682
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Chemistry > Institute of Inorganic Chemistry
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language CHEMICAL-VAPOR-DEPOSITION; THIN-FILMS; HETEROMETALLIC ALKOXIDES; BIMETALLIC ALKOXIDES; MOLECULAR-STRUCTURE; METAL ALKOXIDES; OXIDE CERAMICS; CD2NB2O7; CRYSTAL; FERROELECTRICITY Multiple languages Chemistry, Inorganic & Nuclear Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/22201