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in this video we're gonna focus on name and coordination compounds so let's start with this example CO and H 3 6 CL 2 so how can we name in this particular coordination compound so what you need to realize is that the first part represents the cation the second part is the anion which carries the negative charge now first we're going to go over a few examples where the cation is the complex ion now one of the first things I like to do is identify the oxidation state of cobalt so let's write an equation we have cobalt 6 ammonia molecules and two chlorine atoms or in his case ions now I'm gonna replace cobalt with X because you want to calculate the oxidation state of that nh3 is neutral so I'm going to replace it with zero in this case the oxidation state of the chloride ion is negative 1 and then that charge of a coordination compound is always going to be zero six times zero is zero 2 times negative one is negative two and so we have X minus two is equal to zero and if we add 2 to both sides X is equal to 2 so the oxidation state of cobalt is 2 plus so the complex ion is going to be CEO nh3 six with a two plus charge and then the anions are chloride so the first thing we need to name is the cation in this case the complex on so we have six ammonia molecules six stands for hexa and then the ligand is an amine when we name it you need to use two M's as opposed to one so this is gonna be hexa amine and then we need to name the transition metal cobalt and then the oxidation state which is two so the name of the complex ion is hexa amine cobalt 2 and then we can name the anion which we're going to use an IDE Endon so that's simply going to be chloride and so that's how you can name this particular coordination compound hexa amine cobalt ii chloride now let's move on to our next example you can pause the video and try this one so what is the name of this particular complex or coordination compound rather once again let's calculate the oxidation state so we have Co 5 and H 3 molecules and 3 chlorine particles now ammonia has an oxidation state of 0 chlorine is negative 1 and so it's going to be X minus 3 is equal to 0 so X is 3 so the oxidation state of cobalt is +3 now let's go ahead and name it so let's start with the complex ion first so we have five nh3 molecules so five stands for a Penta so what's gonna be Penta I mean with two M's and then we have a chlorine that's part of the complex ion so we're going to call that chloro and a comes before C so we need to put it in alphabetical order and then after that it's going to be cobalt with an oxidation state of three and then we can leave a space and then for the anion we're just gonna say chloride so it's Penta amine plural cobalt 3 chloride now let's move on to our third example go ahead and try that one so once again the complex ion is the cation now let's determine the oxidation state first the oxidation state of water is 0 and for bromide its negative 1 but there's three of them so this is going to be negative 3 which means cobalt has to have an oxidation state of +3 if you don't like that method of doing things you can write the equation to get the answer now let's start by naming the complex ion or the cation so what is the prefix for water what's the name for when dealing with water he needs to use the word aqua and there's six of them so it's gonna be hexa aqua aqua means water cobalt with an oxidation state of 3 and then the anion is bromide so instead of saying bromine you just replace the ine with IDE so it's hexa aqua cobalt 3 why put bromine this was supposed to be bromide hexa aqua cobalt me bromide let's try this one k3f e CN 6 so this time notice that the anion is the complex ion so the Neyman is going to be a little bit different in this example but first let's calculate the oxidation state of fe so we have 3 potassium atoms or ions and then we have Fe and 6 cyanide ions now the charge on potassium is going to be +1 and for cyanide it's negative 1 so this is 3 and then this is negative 6 so we can combine like terms 3 minus 6 is negative 3 and then if we add 3 to both sides we can see that the oxidation state of Fe is positive 3 or 3 plus so now that we have the oxidation state how can we name it the first thing you should do is name the cation and you just got to name the element so the element K is potassium so next name the complex ion so we have 6 ligands so it's gonna be hexa and for cyanide as a ligand you would call it cyano and then to name Fe you won't say iron but you have to use the latin name so you would say ferry and then the oxidation state which is stream so it's potassium hexa cyano ferry 3 now let's move on to the next example k 3 c o f6 so once again the second one is the complex ion so first let's name k k is potassium and let's identify the oxidation state potassium has a plus one charge fluorine has a minus 1 charge 1 times 3 is 3 negative 1 times 6 is negative 6 now cobalt has to have a +3 charge so that these three numbers add up to zero so once again we have the cobalt 3 plus ion now let's go ahead and name the complex ion so we have 6 ligands therefore this is going to be hexa and the ligand is fluorine so we're going to call it floral and then the Latin name of cobalt which is cobalt 8 then the oxidation state 3 so it's called potassium hexa floral cobalt 8 3 now let's try one more example and instead of using K let's use any so any 4 PT CL 6 feel free to pause the video and try this sodium has a plus 1 charge chlorine has a minus 1 charge so this is gonna be plus 4 minus 6 and for these numbers to add up to 0 platinum has to be plus 2 so now that we know the oxidation state of platinum let's name it so na is called sodium and now listening the complex ion or the complex anion we have 6 chlorine atoms so it's gonna be hexa chloral and then the Latin name for platinum that's gonna be planet with an oxidation state of 2 so it's called sodium hexa-core o planet now just in case you encounter these elements you need to know the Latin name for it so VCC you the Latin name is cuprate and if you see SN Spani now what do you think the Latin names for these elements are PB lead gold and silver so for lead it's gonna be from bate a you or eight and AG Argenti and so those are some other Latin names for other elements that you may encounter so that's it for this video hopefully gave you a good understanding on how to name coordination compounds thanks for watching