Ammonia Uptake and Release in the MnX2–NH3 (X = Cl, Br) Systems and Structure of the Mn(NH3)nX2 (n = 6, 2) Ammines

Author： Reardon Hazel   Hanlon James M.   Grant Michael   Fullbrook Imogen   Gregory Duncan H.  

Publisher： MDPI

E-ISSN： 2073-4352|2|2|193-212

ISSN： 2073-4352

Source： Crystals, Vol.2, Iss.2, 2012-04, pp. : 193-212

Access to resources Favorite

Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.

Previous Menu Next

Abstract

Hexa-ammine complexes, Mn(NH3)6X2 (X = Cl, Br), have been synthesized by ammoniation of the corresponding transition metal halide and characterized by Powder X-ray diffraction (PXRD) and Raman spectroscopy. The hexa-ammine complexes are isostructural (Cubic, Fm-3m, Z = 4; a = 10.2742(6) Å and 10.527(1) Å for X = Cl, Br respectively). Temperature programmed desorption (TPD) demonstrated that ammonia release from Mn(NH3)6X2 complexes occurred in three stages corresponding to the release of 4, 1 and 1 NH3 equivalents respectively. The chloride and bromide both exhibit a deammoniation onset temperature below 323 K. The di-ammoniates from the first desorption step were isolated during TPD measurements and their crystal structures determined by Rietveld refinement against PXRD data (X = Cl: orthorhombic Cmmm, a = 8.1991(9) Å, b = 8.2498(7) Å, c = 3.8212(4) Å, Z = 2; X = Br: orthorhombic Pbam, a = 6.0109(5) Å, b = 12.022(1) Å, c = 4.0230(2) Å, Z = 2).

Related content

Structural characterization of the {3[ΗBPMTU]+ · 3[X]- · nH2O} salts (BPMTU = 1,3-bis(3-pyridylmethyl)-2-thiourea and X = Cl, Br, I). A polychlorine network based on O ··· Cl- and OH ··· Cl- interactions

By Ozturk I. I.   Hadjikakou S. K.   Tsipis A. C.   Malandrinos G.   Kourkoumelis N.   Manos M. J.   Tasiopoulos A. J.   Light M. E.   Hursthouse M.   Bocanegra P. E.   Butler I. S.   Hadjiliadis N.  

Journal of Coordination Chemistry, Vol. 64, Iss. 2, 2011-01 ,pp. : 202-221 (20)

Taylor & Francis Ltd

Access to resources Recommend Favorite

Mechanism of the Selective Catalytic Reduction of NO with NH3over MnOx/Al2O3

By Kijlstra W.S.   Brands D.S.   Smit H.I.   Poels E.K.   Bliek A.  

Journal of Catalysis, Vol. 171, Iss. 1, 1997-10 ,pp. : 219-230 (12)

Academic Press

Access to resources Recommend Favorite

Mechanism of the Selective Catalytic Reduction of NO by NH3over MnOx/Al2O3

By Kijlstra W.S.   Brands D.S.   Poels E.K.   Bliek A.  

Journal of Catalysis, Vol. 171, Iss. 1, 1997-10 ,pp. : 208-218 (11)

Academic Press

Access to resources Recommend Favorite

Synthesis and Characterization of Dianionic Hexacoordinate Silicon(IV) Complexes of Substituted Catechols, Flavones, and Fluorone: X-Ray Crystal Structures of [(n-C3H7)2NH2]2[(Cl4C6O2)3Si] · 3 CH3CN and [(n-C3H7)2NH2]2[(Br4C6O2)3Si] · 2 (CH3)2SO

By Doddi Adinarayana   Kingston J. V.   Ramkumar V.   Suzuki Mika   Hojo Masashi   Rao M. N. Sudheendra  

Phosphorus, Sulfur, and Silicon and the Related Elements, Vol. 187, Iss. 3, 2012-03 ,pp. : 343-356 (14)

Taylor & Francis Ltd

Access to resources Recommend Favorite

Structure and Characterization of the [Rb x (NH 4 ) 1-x ] 2 TeCl 6 Tellurate Family at Room Temperature

By Belgaroui H.  

Journal of Structural Chemistry, Vol. 51, Iss. 4, 2010-08 ,pp. : 689-695 (7)

Springer Publishing Company

Access to resources Recommend Favorite