; When oxygen is part of a peroxide, its oxidation number is -1. Assign an oxidation number of -2 to oxygen (with exceptions). CAS Number 13965-03-2. 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 ( â¦ EC Number 237-744-2. Note that this (I presume) is a #Co^(3+)# complex, i.e. Hence, [x + (0 X 2) + ( -1 X 2)] = 0 Linear Formula [ (C6H5)3P]2PdCl2. 10 years ago. thanks for any help. The net charge on a complex ion is the sum of the charges on the central atom and its surrounding ligands. PubChem Substance ID 24852524. Chloride which is an unindented ligand is of two in number hence 1 X 2 = 2. Get your answers by asking now. 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. Sn +2 Cl -1 2 + Hg +2 Cl -1 2 â Sn +4 Cl â¦ Oxidation Number Calculator is a free online tool that displays the oxidation number of the given chemical compound. Answer Save. in 2Cl2, what is the oxidation number of Chlorine? MDL number MFCD00009593. For example, in the [PtCl 6] 2-ion, each chloride ion has an oxidation number of â1, so the oxidation number of Pt must be +4. Since chlorine is present in the elemental form, its oxidation number is zero. Source(s): Taken 2 years high school chem, 2 semesters college. 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). This is because, oxidation number means that the number of electrons of either lost or gained by an atom of an element during compound formation. 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. Ethylenediamine which is bidentate ligand is of two in number hence 2X2 =4. 1 Answer. Still have questions? Favorite Answer. Molecular Weight 701.90. Maria. 3 0. It's 0. Ethylenediamine is a bidentate ligand; it has 2 donor atoms to coordinate to the metal centre in a 5-membered chelate ring. 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 . cisplatin - (Pt(NH3)2Cl2) How would I work out the oxidation number of Pt in cisplatin? The oxidation number for all atoms in elemental state is 0. 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