Sn +2 Cl -1 2 + Hg +2 Cl -1 2 → Sn +4 Cl … Cl oxidation number is always -1 so based on that we can say the chlorine in this molecule has an oxidation number of (-1)4. then we deal with the hydrogen, since we already know that hydrogen is not bonded as a hydrate ( bonded directly to a metal) its oxidation state will be positive so . Still have questions? Chloride which is an unindented ligand is of two in number hence 1 X 2 = 2. Hence co-ordination number of Platinum will be 4 + 2 = 6 Oxidation state of Pt: Charge on complex = 0. CAS Number 13965-03-2. For example, in the [PtCl 6] 2-ion, each chloride ion has an oxidation number of –1, so the oxidation number of Pt must be +4. 1 Answer. MDL number MFCD00009593. Assign an oxidation number of -2 to oxygen (with exceptions). Oxidation Number Calculator is a free online tool that displays the oxidation number of the given chemical compound. EC Number 237-744-2. Maria. There are a few exceptions to this rule: When oxygen is in its elemental state (O 2), its oxidation number is 0, as is the case for all elemental atoms. Ethylenediamine which is bidentate ligand is of two in number hence 2X2 =4. #d^6# configuration, whose formula is #[Co(en)_2Br_2]^(+)#, not as quoted in your question. Note that this (I presume) is a #Co^(3+)# complex, i.e. In almost all cases, oxygen atoms have oxidation numbers of -2. Oxidation Number. thanks for any help. Source(s): Taken 2 years high school chem, 2 semesters college. Relevance. Ethylenediamine is a bidentate ligand; it has 2 donor atoms to coordinate to the metal centre in a 5-membered chelate ring. cisplatin - (Pt(NH3)2Cl2) How would I work out the oxidation number of Pt in cisplatin? Answer Save. It's 0. Get your answers by asking now. If an atom gains electron, the oxidation number is negative; if it looses electrons then the oxidation number is positive and if its octet is complete, oxidation number is zero. ; When oxygen is part of a peroxide, its oxidation number is -1. Favorite Answer. Hence, [x + (0 X 2) + ( -1 X 2)] = 0 The net charge on a complex ion is the sum of the charges on the central atom and its surrounding ligands. Molecular Weight 701.90. In the complex [Co(en)2Cl2 ]Br, the co-ordination number and oxidation state of cobalt are : asked Oct 11, 2019 in Co-ordinations compound by KumarManish ( … Beilstein/REAXYS Number 4935975. Oxidation number (also called oxidation state) is a measure of the degree of oxidation of an atom in a substance (see: Rules for assigning oxidation numbers). 3 0. 10 years ago. in 2Cl2, what is the oxidation number of Chlorine? Linear Formula [ (C6H5)3P]2PdCl2. Since chlorine is present in the elemental form, its oxidation number is zero. 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