Experimental Compounds to know Flashcards
Co(H₂O)₆²⁺
-octahedral complex
-Co(II)
-pink
-labile
-occurs when Co(II) salt dissolves in water
Co(Cl)₄²⁻
-tetrahedral complex
-Co(II)
-blue
-Cl is monoanionic, so tetrahedral forms (just like SCN)
-labile
Fe(H₂O)₆³⁺
-octahedral complex
-Fe(III)
-pale purple
-forms when Fe(III) salts dissolve in water
-can occasionally form Fe(H₂O)₅(OH)²⁺ and become yellow
Cu(H₂O)₆²⁺
-octahedral complex
-Cu(II)
-blue
-occurs when Cu(II) is dissolved in water
Cu(NH₃)₄(H₂O)₂²⁺
-octahedral complex
-Cu(II)
-purple
-occurs when NH₃ is added to Cu(H₂O)₆, as it cannot displace last two H₂Os
[Co(NH₃)₆]Cl₃
-octahedral complex compound
-Co(III)
-yellow-orange
-inert
-occurs after ligand substitution of NH₃ and oxidation of Co(II) to Co(III)
[Fe(ferrozine)₃]⁴⁻
-octahedral complex
-Fe(II)
-purple
-ferrozine is bidentate ligand
-occurs after reduction of Fe(III) to Fe(II) and ligand substitution of ferrozine
Fe(H₂O)₆²⁺
-octahedral complex
-Fe(II)
-blue-green
-occurs after reduction of Fe(III) to Fe(II)
MnO₄⁻
-permanganate
-appears purple
-Mn O.N.= +7
Mn²⁺
-colorless
-occurs when MnO₄⁻ is dissolved in acidic medium
-Mn O.N.= +2
MnO₂
-brown with precipitate
-occurs when MnO₄⁻ is dissolved in basic medium
-Mn O.N.= +4
MnO₄²⁻
-green
-occurs when MnO₄ is dissolved in very basic medium
-Mn O.N.= +6
C₇H₁₆
-Heptane
-does not mix with water (polar)
-less dense than water, floats to top
-nonpolar
-nonpolar (halogen) molecules are soluble
I₂
-appears purple in heptane layer
Cl₂
-appears green in heptane layer
