CHemical formula names
a. Name either the complex, or given the name of the complex, write the formula for the complex
I. Fe[AlF6]
II. tetracarbonylplatinum(IV) chloride III. [CrBr(H2O)(en)2]Cl2
IV. K3[Fe(CN)6]
I have really no idea how to do this
http://www.chemistry.wustl.edu/~edudev/LabTutorials/naming_coord_comp.html
Naming chemical formulas can be confusing at first, but with some practice, it becomes easier. To name a complex, you need to learn the rules of chemical nomenclature.
I. Fe[AlF6]
- The name of the complex is usually given in square brackets.
- Fe indicates the metal ion, which is iron in this case.
- AlF6 represents the ligands, in which Al is the central atom and F6 represents six fluoride ions surrounding the central atom.
- To name this complex, you combine the name of the metal ion and the ligands, giving you "iron hexafluoroaluminate."
II. tetracarbonylplatinum(IV) chloride
- In this name, "tetracarbonyl" indicates that there are four carbon monoxide (CO) ligands attached to the central metal ion.
- "Platinum(IV)" refers to the metal ion, which is platinum with a 4+ charge.
- "Chloride" indicates that there is one chloride (Cl-) ligand in the complex.
- To write the formula, you count the number of ligands and their charges. In this case, four CO ligands have no charge, and one Cl- ligand has a 1- charge. Therefore, the formula is Pt(CO)4Cl.
III. [CrBr(H2O)(en)2]Cl2
- The square brackets indicate the complex.
- The metal ion is Cr, representing chromium.
- Br and H2O are ligands, and (en)2 represents two ethylenediamine ligands.
- To name this complex, you combine the name of the metal ion and the ligands, giving you "chromium bromide dihydrate ethylenediamine complex chloride."
- To write the formula, you count the number of ligands and their charges. There are two Br- ligands, two H2O ligands, and two (en) ligands. The Cl- ion outside the brackets has a 2- charge. Therefore, the formula is [CrBr2(H2O)2(en)2]Cl2.
IV. K3[Fe(CN)6]
- K3 indicates three potassium ions (K+) outside the brackets.
- Inside the brackets, there is [Fe(CN)6], which represents the complex.
- The metal ion is Fe, indicating iron.
- CN represents the ligand cyanide (CN-).
- To name this complex, you combine the name of the metal ion and the ligand, giving you "potassium hexacyanoferrate(III)."
- To write the formula, you count the number of ligands and their charges. There is one Fe3+ ion and six CN- ligands. The three K+ ions outside the brackets balance the overall charge. Therefore, the formula is K3[Fe(CN)6].