Sn +2 Cl -1 2 + Hg +2 Cl -1 2 â Sn +4 Cl â¦ Favorite Answer. Maria. 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. thanks for any help. PubChem Substance ID 24852524. 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. 10 years ago. #d^6# configuration, whose formula is #[Co(en)_2Br_2]^(+)#, not as quoted in your question. Get your answers by asking now. cisplatin - (Pt(NH3)2Cl2) How would I work out the oxidation number of Pt in cisplatin? Chloride which is an unindented ligand is of two in number hence 1 X 2 = 2. Hence, [x + (0 X 2) + ( -1 X 2)] = 0 It's 0. 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). 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 . Relevance. in 2Cl2, what is the oxidation number of Chlorine? Ethylenediamine which is bidentate ligand is of two in number hence 2X2 =4. 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. Oxidation Number. 3 0. Still have questions? BYJUâS online oxidation number calculator tool makes the calculation faster and it displays the oxidation number in a fraction of seconds. ; When oxygen is part of a peroxide, its oxidation number is -1. 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¦ Ethylenediamine is a bidentate ligand; it has 2 donor atoms to coordinate to the metal centre in a 5-membered chelate ring. MDL number MFCD00009593. Hence co-ordination number of Platinum will be 4 + 2 = 6 Oxidation state of Pt: Charge on complex = 0. EC Number 237-744-2. Linear Formula [ (C6H5)3P]2PdCl2. Answer Save. Oxidation Number Calculator is a free online tool that displays the oxidation number of the given chemical compound. In almost all cases, oxygen atoms have oxidation numbers of -2. Source(s): Taken 2 years high school chem, 2 semesters college. 1 Answer. Assign an oxidation number of -2 to oxygen (with exceptions). 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. 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