20.500.12556/DKUM-67642 Synthesis and characterisation of hydroxylammonium fluorochromate Sinteza in karakterizacija hidroksilamonijevega fluorokromata Reactions in the system $Cr – NH_3OHF – HF – H_2O$ were investigated. Green crystals of a new compound with the formula $(NH_3OH)_3CrF_6$ have been isolated from the water solution and characterized by chemical analysis. The compound crystallizes as triclinic, P-1, with cell parameters: a = 6.5461(2) Å, b = 6.9347(2) Å, c = 9.4072(3) Å, α = 86.772(1)°, β = 83.804(1)°, γ = 70.283(1)°. The effective magnetic moment, $µ_{eff}$ = 3.82 BM, was calculated from magnetic susceptibility measurements in the temperature range 80-290 K. The thermal decomposition of the compound was studied by TG and DSC analysis. $(NH_3OH)_3CrF_6$ decomposes above 125 °C in three steps and the residue has been identified by X-ray powder diffraction as $α – Cr_2O_3$. Raziskovali smo reakcije v sistemu $Cr – NH_3OHF – HF – H_2O$. Iz vodne raztopine smo izločili zelene kristale nove spojine in s kemijsko analizo določili formulo $(NH_3OH)_3CrF_6$. Spojina kristalizira triklinsko, P-1, s parametri osnovne celice: a = 6.5461(2) Å, b = 6.9347(2) Å, c = 9.4072(3) Å, α = 86.772(1)°, β = 83.804(1)°, γ = 70.283(1)°. Iz meritev magnetne susceptibilnosti v območju 80-290 K smo izračunali efektivni magnetni moment, $µ_{ef}$ = 3.82 BM. S termogravimetričnimi in diferencialno termičnimi meritvami smo spremljali termični razkroj spojine. $(NH_3OH)_3CrF_6$ nad temperaturo 125 °C razpada v treh stopnjah, pri čemer smo končni preostanek identificirali z rentgenskimi praškovnimi meritvami kot $α – Cr_2O_3$. inorganic chemistry structural chemistry crystalline structure coordination compounds synthesis inorganic reactions thermal decomposition characterization of compounds TG DSC X-ray diffraction chromium complexes hydroxylammonium fluoro chromates crystals anorganska kemija strukturna kemija kristalna struktura koordinacijske spojine sinteza anorganske reakcije termični razkroj karakterizacija spojin TG DSC rentgenska difrakcija kromovi kompleksi hidroksilamonijevi fluorokromati kristali true false true Angleški jezik Slovenski jezik Znanstveno delo 2017-08-25 11:48:45 2017-08-25 11:49:47 2022-08-01 14:16:31 2019-07-11 16:26:33 2003 0 0 str. 431-440 št. 3 Letn. 50 2003 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 1318-0207 546.76.022.057:543.422.3:548.73 14086149 25335557 1318-0207 URN:SI:UM:DK:8TXXKQBT Acta_Chimica_Slovenica_2003_Kristl_et_al._Synthesis_and_characterisation_of_hydroxylammonium_fluorochromate.pdf Acta_Chimica_Slovenica_2003_Kristl_et_al._Synthesis_and_characterisation_of_hydroxylammonium_fluorochromate.pdf 1 B0200B56A77FDB4F41DD9A8AB7424B26 41bdc4506ab2ac52edb461302493c632928dd76f964e9e97bfac12615ba3d9e9 902ac643-7c0e-11eb-bb7a-00155d0001ca 20.500.12556/dkum/ecc3f8c5-d8e7-49fb-b300-6ed6424c9dd8 https://dk.um.si/Dokument.php?lang=slv&id=116050 http://acta-arhiv.chem-soc.si/50/50-3-431.pdf 1 https://dk.um.si/Dokument.php?lang=slv&id=116049 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0