hydrogen bonds making it less stable than the anti or gauche form. The gauche form is the second most stable configuration of butane where the two methyl groups are staggered 60° apart from each other. The gauche conformation exhibits steric strain repulsion between the two methyl groups that are sticking out. The last molecule is the syn conformation of butane and it is the least stable conformation. The syn conformation consists of steric and torsional strain between its carbon carbon bonds and carbon
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by locating the longest carbon chain that contains the double bond and name it according to the number of carbons with the suffix -ene. H 3C CH2 C H 3C CH2 CH2 CH2 H 3C CH2 CH2 H 3C CH2 C CH2 Parent = pentene not hexene (does not contain double bond) 2. a. Number the carbons of the parent chain so the double bond carbons have the lowest possible numbers. H 3C 6 CH2 CH2 CH 5 4 3 CH 2 CH3 1 2-hexene b. If the double bond is equidistant from each end, number so the first substituent
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|IUPAC SYSTEM OF NAMING COMPOUNDS |SUBSTITUENTS | |Select the longest continuous chain of carbon atoms for the basic name. |F- | |Number the carbons in the chain from the end nearest the first branch (to give |fluoro |
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Hello, I’m oxygen particle but you can call me Oxy, and today I’ll be taking you on an exclusive tour through the human body where we will meet many of my important friends, in relation to the Respiratory System. To start off with today, we will enter the human body as air through my friend, Nostril. Nostril has an important job to do; it’s up to Nostril to give the tour groups of oxygen particles a warm welcome, by filtering and removing larger unwanted particles and moistening them with his tiny
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ACTIVITY: UNDERSTANDING ELECTRONIC CONFIGURATION, VALENCE AND VALENCE ELECTRONS. You are provided three necklace chains with 17 beads and one button. Consider the necklace chain as shells, beads as electrons and button as nucleus. You have to fill the electron shells around nucleus by putting these 17 beads into the three necklace chains around button following the Bohr-Burry and Octet Rule. Identify the element, its electronic configuration, valency and number of valence electrons. QUESTIONS AND
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Electronegativity: the ability or tendency of an atom to attract electrons in the formation of an ionic bond. An atoms's electronegativity is affected by both its atomic number and the distance that its valence electrons reside from the charged nucleus. The higher the associated electronegativity number, the more an element or compound attracts electrons towards it. Trend--As one moves from left to right across a period in the periodic table, the electronegativity increases due to the
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unique property that the solid form is less dense than the liquid form. This is because there are less molecules per unit area in the solid form than the liquid form in water. The crystal structure that water forms is stabilized by hydrogen bonds. These bonds are an attraction that arises as a result of interactions between the partial negative charge of an Oxygen atom on one water molecule, and the partial positive charge of a Hydrogen atom on an adjacent molecule. Partial charges on water molecules
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CRYSTAL STRUCTURES CRYSTAL STRUCTURES • Have you ever wondered how atoms assemble into solid structures? • How does the density of a material depend on its structures? CRYSTAL STRUCTURES • Solid materials can broadly be classified as crystalline and non crystalline (amorphous) solids. • In crystalline solid the arrangement of atoms is in a periodically repeating manner whereas no such patterns are found in a non-crystalline solid. CRYSTAL STRUCTURES • 2 types of crystalline solids:
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the IUPAC preferred method of describing the stereochemistry of double bonds in organic chemistry. It is an extension of cis/trans notation that can be used to describe double bonds having three or four substituents. Following a set of defined rules (Cahn-Ingold-Prelog priority rules), each substituent on a double bond is assigned a priority. If the two groups of higher priority are on opposite sides of the double bond, the bond is assigned the configuration E (from entgegen, German: [ɛntˈɡeːɡən]
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six-carbon ring containing only single bonds. Numbering of the carbons on the ring could start at any point, but typically, numbering starts at the top carbon atom of the ring for convenience. The ethyl group (–CH2CH3) is located at position 1 and the methyl group is located at position 3. CH2 CH3 1 6 2 3 5 CH3 4 c) The longest continuous chain contains seven carbon atoms, so the root name is “hept-.” The molecule contains only single bonds, so the suffix is “-ane.” Numbering
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