Structural formulae skeletal

It is Important to note that. In a skeletal structural formula, the carbon atoms are not shown and neither are the hydrogen atoms attached to the carbon atoms. Hydrogen atoms are only shown If they are bonded to atoms such as oxygen or nitrogen. 

The table shows further examples of skeletal structural formulae. 

Skeletal structural formulae are commonly used, particularly for large molecules, because they are easily drawn and the functional groups are clearly shown. 

The skeletal structural formula of aspirin is shown here. 

Draw a skeletal structural formula for each of the following compounds ... 

Convert each of the following skeletal structural formulae into an abbreviated structural formula ... 

You must be able to draw full structural formulae, abbreviated structural formulae and skeletal structural formulae and be able to interconvert them. 

FIGURE 2.3 Skeletal structural formulas of a linear polymer (a) and a network (cross-linked) polymer with low cross-linking density (b) and high cross-linking density (c). 

To avoid confusion in describing polyamine separations, Table I shows skeletal structural formulas of the isomeric and homologous polyethylene polyamines. Included with each formula is a derived abbreviation corresponding to the N-permethylated tertiary amine counterpart of the particular structure. The abbreviations are based on the homologous relationship of the N-permethylated structures to the first member of the series, N,N,N, N -tetramethylethylenediamine, or TMED (Compound 1,... 

Write the skeletal structural formulas of the alcohols with the formula C6H13O and indicate those that are chiral. 

Therapeutic Function Skeletal muscle relaxant Chemical Name 5-chloro-2(3H)-benzoxazolone Common Name 5-chloro-2-hydroxybenzoxazole Structural Formula ... 

Therepeutic Function Analgesic, skeletal muscle relaxant Chemical Name a-[ (2-Pyridinylemino)methyl] benzenemethenol Common Name Feny ram idol Structural Formula ... 

Convert each of the following molecular models into a skeletal structure, and give the formula of each. Only the connections between atoms are shown multiple bonds are not indicated (gray = C, red = O, blue = N, ivory = H). 

B There are a total of sixteen valence electrons in the cyanamide molecule (five from each nitrogen atom, four from carbon and one electron from each hydrogen atom). The formula has been written as NH2CN to remind us that carbon, the most electropositive p-block element in the compound should be selected as the central atom in the skeletal structure. 

Isoprene (2-methylbuta- 1,3-diene [Structures 7.1a and 7.1b]) is a C5 unit. Structure 7.1a shows the full structural formula where each line between the atoms represents two shared electrons in a covalent bond. In the case of more complex molecules, skeletal structures are used, as in Structure lb, where carbon atoms are normally represented by an intersection of bonds. Carbon-hydrogen bonds are not shown, although all other atoms (O, N, P and so on) are indicated. 

All are based on a centred icosahedron of gold atoms with two atoms missing, and each peripheral gold is bound to either a phosphine or a halide or thiocyanate ligand.693-696 A typical skeletal structure for the [AU11X3L7] structure is (111). Some closely related derivatives of formula [AunX2L8]+ are also known.692... 

Complete fundamental cyclic formulas showing all carbons and hydrocarbons are given only in Charts 1, 2, 4, 8, and 9 in the other charts, the conventional ter-pene skeletal formulas have been used. For those not familiar with these common terpene formulas of the monocyclic and bicyclic structures, Chart 2 is included to show the different forms of identical structures which appear in current chemical literature. Only saturated structures are given. The three-dimensional type of skeletal formulas shown for the bicyclic structures is being used currently more and more because they often permit much more to be expressed concerning the properties of a compound and its relations to a fundamental type than do the classical structural formulas. 

A complete structural formula (such as a Lewis structure) shows all the atoms and bonds in the molecule. A condensed structural formula shows each central atom along with the atoms bonded to it. A line-angle formula (sometimes called a skeletal structure or stick figure)... 

Several possible skeletal structures can satisfy each molecular formula. 

Draw and interpret structural formulas and skeletal structures for common organic compounds. 

Structural formulas are sometimes represented by what are called skeletal structures, which show bonds, but leave out some or even all of the carbon and hydrogen atoms. You have already seen the skeletal structure for benzene, which is a hexagon with a ring inside it. 

Draw both the structural formula and the skeletal structure for 1,2,3-propanetriol. 

Write the molecular formula for the compound with the following skeletal structure. 

How does a skeletal structure differ from a structural formula How are they the same ... 

The skeletal structure for proline, an amino acid, is shown below. Draw its structural formula. 

Problem 2.19 Propose skeletal structures for compounds that satisfy the following molecular formulas (there is more than one possibility in each case) ... 

Lunn and Senior35 proposed many years ago a mathematical model of isomerism in organic chemistry which Iliev generalized in recent years.36 38 Lunn and Senior considered three types of isomerism (i) univalent substitution isomerism (positional isomerism), (ii) skeletal (structural) isomerism and (iii) enantiomorphism. Univalent substitution isomerism is the relationship existing between any two compounds Ai and A2 with the same empirical formula in case that structural formula of A can be converted into that of A2 by a permutation of the univalent substituents without disturbing the skeleton. Then the molecules Ai and A2 are said to be univalent substitution isomers. For example, 1-chloropropane and 2-chloropropane are univalent substitution (positional) isomers. Skeletal isomers are any two compounds Ai and A2 with... 

Hydrocarbons are classified by whether their carbon structure includes rings, multiple bonds, or branches. Classification of hydrocarbon structural families is shown here with the chemical formula. Structures are shown as Kekule (also called line-bond) and skeletal structures. 

---