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(a) The dot-and-cross diagram of the simplified LDQ structure of digermyne. The nuclei are as indicated and the electrons are denoted by either dots or crosses, depending on their relative spins. The ellipse in the centre indicates the relative disposition of the electrons around the germanium-germanium internuclear axis.
[1] [2] [3] Introduced by Gilbert N. Lewis in his 1916 article The Atom and the Molecule, a Lewis structure can be drawn for any covalently bonded molecule, as well as coordination compounds. [4] Lewis structures extend the concept of the electron dot diagram by adding lines between atoms to represent shared pairs in a chemical bond.
2 Al(CH 3) 3 + 3 H 2 O → Al 2 O 3 + 6 CH 4. H 2 O in the above reaction can be replaced by ozone (O 3) as the active oxidant and the following reaction then takes place: [44] [45] 2 Al(CH 3) 3 + O 3 → Al 2 O 3 + 3 C 2 H 6. The Al 2 O 3 films prepared using O 3 show 10–100 times lower leakage current density compared with those prepared by ...
2 CuCl 2 → 2 CuCl + Cl 2 The reported melting point of copper(II) chloride of 498 °C (928 °F) is a melt of a mixture of copper(I) chloride and copper(II) chloride. The true melting point of 630 °C (1,166 °F) can be extrapolated by using the melting points of the mixtures of CuCl and CuCl 2 .
A center dot may also be used to represent a Lewis adduct, such as Me 3 B·NH 3. Another example is boron trifluoride diethyl etherate , BF 3 ·Et 2 O . In a slightly different usage, the center dot is also used to represent hydrate coordination in various crystals, as in MgSO 4 ·7H 2 O for hydrated magnesium sulfate , irrespective of whether ...
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1st Transition Series Complex colour electron config. structure geometry comments TiCl 4: colourless (t 2g) 0: tetrahedral [Ti 2 Cl 9] −: white/colourless d 0 d 0: face-sharing bioctahedron