Sunday, February 24, 2013

Organic Chemistry~

History of Organic Chemistry

Frederich Wohler (1800-1882). His synthesis of urea from inorganic compounds did much to overthrow the "vital force" theory of organic chemistry. At the age of 27, he discovered the element aluminium, and is known for many outstanding contributions to both inorganic and organic chemistry.


During the latter part of the eighteenth century and early of the nineteenth century, chemist began to distinguish between two types of compound: organic compounds and inorganic compounds.
During the time period, chemist also thought that organic compounds contained a special "vital vorce" that only a living organism could supply. They thought the only source of these compounds was nature itself. The fact that no scientists were able to successfully synthesize a known organic compound from inorganic starting materials gave crendence to this "vital force" theory.
Vital Force Theory, "Inorganic materials could be converted to organic materials in the presence of a vital force found only in living bodies."

We know that the "vital force" theory is incorrect. In 1828, the German chemist Frederich Wohler obtained unexpected result from a routine inorganic experiment has wa conducting. While attemping to recrystallize the inorganic salt NH4CNO from a solvent, he inadvertenly produced the well-known organic compound yrea, a compound of urine. Wohler's results were the stimulus for the renewed effort of the scientist to synthesis organic substances from inorganic starting material. This time, after a century of negative result, there were numerous successful reactions. By 1860, the "vital force" theory was laid to rest, and Frederich Wohler become known as the father of organic chemistry. Despite the fall of the "vital force" theory, with its emphasis on the living and nonliving origins of substances, the terminology associated with the theory (the categories of organic and inorganic) is still in use. However, the original definitions for these terms have changed.

Then, organic chemistry is defined as the study of hydrocarbons (binary compounds of hydrogen and carbon) and their derivatives. Interestingly, almost all compounds found in living organisms still fall in the field organic chemistry when this modern definition is applied. In additions, many compound that are synthesized in the laboratory, which have never been found in nature or in living organism, are considered to be organic compounds.

References:
Rusman, M.Si & Riandari Dwika, M.Si. 2012. Organic Chemistry. Bogor: Bogor High School of Chemical Analyst.

Sorry if there was many of typo -_-v

Monday, February 11, 2013

Sometimes.....


Assalamu'alaikum....
Hei~ I'm coming back just for share my story u,u

To the point aja, kadang gue ngerasa bete sama sikap sahabat gue yang kadang rasanya terlalu ngiket gue. Entah gue yang terlalu ngerasa begitu atau gimana tapi ini bikin gue gaenak dan kadang gak nyaman sama mereka. Gue bete kalo gue abis jalan sama cowo gue kadang ada yang bete, terutama umi. Mungkin emang dia yang paling deket sama gue, tapi gue rada gasuka kalo kaya gini-_- tapi kan gue udah sering barengan sama dia, jalan sama dia yaa sesekali gantian lah waktu gue buat hafidz ._.

Aduh gue takut salah ucap nih, maaf yah buat sahabat-sahabat gue. tapi emang gue kadang ngerasa gasuka kalo kalian ngejauhin gue cuma gara gara gue sama yang lain. Hafidz juga cerita kalo dia suka dijutekin sama sahabat-sahabat gue, yaa gue jawab aja mereka emang suka kaya gitu hehe
Hei, maafin gue kalo gue gak ada disaat kalian butuh, kalo gue mungkin terlalu sering sama hafidz. Tapi jangan terlalu ngiket gini, dikit dikit ngambek, asaan gue gapernah ngambek gara gara kalian jalan atau main sama yang lain. Yaudah yang penting mah gue minta maaf. Jujur gue gakuat kalo didiemin sama kalian.

Gue juga punya dunia gue sendiri, kalian juga. Ada dimana saat gue sama keluarga, sahabat, temen, hafidz, orang lain, dan gue sendiri. Dan gue gak mau kalo ada orang yang ngambek kalo gue lagi di dunia gue yang lain.
Iya ini udah sering terjadi, dan mungkin gue yang salah.

Oke gue bingung mau nulis apalagi, sebenernya ada dipikiran gue tapi karena besok gue mau ujian Mikrobiologi dan sekarang sudah larut malam dan gue sadar gue harus segera istirahat u,u
Oke gue semangat ajaaaa. Keep fight and smile *nyemangatin diri sendiri*. See you

Wassalamu'alaikum