Back to Search
Start Over
Synthesis of a highly reactive form of WO2Cl2, its conversion into nanocrystalline mono-hydrated WO3 and coordination compounds with tetramethylurea.
- Source :
- Dalton Transactions: An International Journal of Inorganic Chemistry; 10/21/2016, Vol. 45 Issue 39, p15342-15349, 8p
- Publication Year :
- 2016
-
Abstract
- A new form of WO<subscript>2</subscript>Cl<subscript>2</subscript> was obtained by modification of a literature procedure. Both the newly prepared WO<subscript>2</subscript>Cl<subscript>2</subscript> and the commercial yellow WO<subscript>2</subscript>Cl<subscript>2</subscript> exhibited an orthorhombic structure (powder X-ray diffraction, P-XRD), and their air exposure at room temperature afforded light green and lemon yellow WO<subscript>3</subscript>·H<subscript>2</subscript>O (orthorhombic phase), respectively. These materials were characterized by P-XRD, high-resolution transmission electron microscopy (HR-TEM) and scanning transmission electron microscopy (S-TEM). The analyses revealed the nanocrystalline nature of light green WO<subscript>3</subscript>·H<subscript>2</subscript>O, and the prevalent amorphism of lemon yellow WO<subscript>3</subscript>·H<subscript>2</subscript>O. The reactions of grey WO<subscript>2</subscript>Cl<subscript>2</subscript> with one and two equivalents of tetramethylurea (tmu), in CH<subscript>2</subscript>Cl<subscript>2</subscript> at room temperature, led to the isolation of the trinuclear complex [WO<subscript>2</subscript>Cl<subscript>2</subscript>(tmu)]<subscript>3</subscript>, 1 (45% yield), and the mononuclear one WO<subscript>2</subscript>Cl<subscript>2</subscript>(tmu)<subscript>2</subscript>, 2 (64%), respectively. Compounds 1 and 2 were fully characterized by analytical and spectroscopic methods, single crystal X-ray diffraction (SC-XRD) and DFT calculations. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 14779226
- Volume :
- 45
- Issue :
- 39
- Database :
- Complementary Index
- Journal :
- Dalton Transactions: An International Journal of Inorganic Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 118537852
- Full Text :
- https://doi.org/10.1039/c6dt02997c