Enter your email address:

Delivered by FeedBurner

Modern Defination Of organic Chemistry

The modern defination of organic chemistry  may be simply be stated as "Organic Chemistry is Defined as The Study of Compostion Properties and Structureof Carbon Compound " except

(1) Carbon Dioxide (CO2)
 Formula   CO2
Density     1.98 kg/m³
Molar mass  44.01 g/mol
Boiling point   -57 °C
Melting point   -78 °C
Soluble in        Water
(2) Carbon Monoxide (co)
Formula           CO
Molar mass 28.010 g/mol
Appearance colourless gas
Odor odorless
Density 789 kg/m3, liquid
1.250 kg/m3 at 0 °C, 1 atm
1.145 kg/m3 at 25 °C, 1 atm
Melting point −205.02 °C, 68 K, -337 °F
Boiling point −191.5 °C, 82 K, -313 °F
Solubility in watER 27.6 mg/1 L (25 °C)
Solubility soluble in chloroform, acetic acid, ethyl acetate, ethanol, ammonium hydroxide, benzene
(3) Carbon Disulphide (CS2)
Formula: CS2
Boiling point: 46.3 °C
Molar mass: 76.139 g/mol
IUPAC ID: Carbon disulfide
Density: 1.26 g/cm³
Melting point: -110.8 °C
Viscosity 0.363
Flash point -30 °C
Explosive limits 1.3–50%
Related compounds: Carbon dioxide
Carbonyl sulfide
Carbon diselenide
data: Phase behaviour
Solid, liquid, gas
(4) Carbonates e.g Na2CO3  
Formula: Na2CO3
Molar mass: 105.9784 g/mol
Density: 2.54 g/cm³
Melting point: 851 °C
Boiling point: 1,633 °C
Soluble in: Water
 Flash point   Non-flammable
(5) Bicarbonates e.g NaHCO3
Formula: NaHCO3
Molar mass: 84.007 g/mol
IUPAC ID: Sodium hydrogen carbonate
Melting point: 50 °C
Density: 2.20 g/cm³
Soluble in: Water
(6) Cyanide e.g KCN
Formula: KCN
IUPAC ID: Potassium cyanide
Molar mass: 65.12 g/mol
Boiling point: 1,625 °C
Density: 1.52 g/cm³
Soluble in: Water

Solubility in methanol 4.91 g/100 mL (20 °C)
Solubility in glycerol soluble
Solubility in formamide 14.6 g/100 mL
Solubility in ethanol 0.57 g/100mL
Solubility in hydroxylamine 41 g/100 mL
(7) Thiocyanates e.g NaSCN
Formula: NaSCN
Molar mass: 81.072 g/mol
Density: 1.74 g/cm³

Melting point 287 °C, 560 K, 549 °F
Solubility in water 139 g/100 mL (21 °C)
Solubility soluble in acetone, alcohols
(8) Cyanates e.g KOCN {potassium cyanate}
Molecular formulaKOCN
Molar mass81.1151 g/mol
Appearancewhite, crystalline powder
Density2.056 g/cm3
Melting point315 °C
Boiling point~ 700°C, decomp.
Solubility in water75 g/100 mL
Solubilityvery slightly soluble in alcohol
(9) Carbides e.g CaC{Calcium carbide}
Molecular formula CaC2
Molar mass 64.099 g/mol
Appearance White powder to grey/black crystals
Density 2.22 g/cm3
Melting point 2160 °C, 2433 K, 3920 °F
Boiling point 2300 °C, 2573 K, 4172 °F
Solubility in water decomposes

These compound contain carbon but studied as a part of inorganic chemistry  due to their properties



there are two main classes of chemical compounds:

                                                      (1)  Inorganic compounds
                                                      (2)  Orgnaic compounds
  • in the early day of chemistry,all substences knowe were classicfaid on the basic of their origin so the compounds having mineral origan were knowe as" Inorganic Compounds" (e.g) table salt, marble salt, carbon dioxide etc.
  • the compounds which have vegatable or animals origin were knowe as "Organic Compounds".(e.g)acetic acis, alcohol, acetone, gluocse, sucrose, etc

at one time, it was believes that organic compound be only produced by living matter. for living matter a special force called " vital force" was neccessary.

this concept ( vital force theory ) was unchallenged since 1828 and no effort was made to produce organic compound in lab. in the latter part of 1828, the german shemist " fridrich whohler" perpared urea in the lab by heating ammonium cyanate, derived from inorganic substances. this synthetically made urea in the lab was proved  to be indentical in all respect  with urea (isolated from urine)

 KOCN+ NH4Cl -------------------------------->KCL + NH4OCN

 (Ammonium Chloride. MOL WT 53.491 NH4CL)

             NH4OCN ------------------------> NH2---C---NH2                        
   (Ammonium Cyanate mol.wt 60.05526 NH4OCN) 


this synthesis of an organic compound from totally inorganic compound material did not immediately breakdown the old concept. in the folowing year synthesis of msny organic compound were archived. thus by 1850, the vital force theory was finally and decisively disproved. it had become evident, howere, that most of the compounds formed by living cells contained "CARBON" and the concept regarding organic compound was shifted from" ORIGN  to COMPOSTION  and organic compounds are considered as those containing "CARBON".

Infolink ads