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Lecture1_07 - Chapter 12 The historical origins of the...

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1/7/2010 1 Chapter 12 The historical origins of the terms organic and inorganic involve the following conceptual pairings: Organic = Living organisms Inorganic = Inanimate materials This concept was proved incorrect when Friedrick Wohler heated an aqueous solution of two inorganic compounds, and obtained urea, an organic compound. NH 4 Cl + AgNCO (NH 2 ) 2 CO + AgCl Urea
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1/7/2010 2 Organic chemistry: Study of hydrocarbons (only carbon and hydrogen atoms) and their various derivatives. Inorganic chemistry: Study of all substances other than hydrocarbons and their derivatives. Carbon possesses 4 valence electrons so 4 additional valence electrons are needed to give carbon an octet. These additional electrons are obtained by electron sharing (covalent bond formation). The sharing of four valence electrons requires the formation of four covalent bonds.
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3 1. By bonding to four other atoms. 2.
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Lecture1_07 - Chapter 12 The historical origins of the...

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