What is Compounds: Definition and 236 Discussions

Carbon compounds are defined as chemical substances containing carbon. More compounds of carbon exist than any other chemical element except for hydrogen. Organic carbon compounds are far more numerous than inorganic carbon compounds. In general bonds of carbon with other elements are covalent bonds. Carbon is tetravalent but carbon free radicals and carbenes occur as short-lived intermediates. Ions of carbon are carbocations and carbanions are also short-lived. An important carbon property is catenation as the ability to form long carbon chains and rings.

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  1. AGNuke

    Allyl Bromide + HBr - Compounds formed during reaction.

    Allyl Bromide, during the addition of HBr gives CH_3-CHBr-CH_2Br CH_2Br-CH_2-CH_2Br CH_3-CH_2-CHBr_2 CH_3-CBr_2-CH_3 My take During the addition of HBr, electrophile will attack first, considering the shift of pi bond in allyl bromide as follows: BrCH_2-CH=CH_2 \longrightarrow...
  2. P

    Are these cyclohexanes truly chiral or is it a trick question?

    Homework Statement Looking at questions 18-20 on this webpage: http://www.utdallas.edu/~scortes/ochem/OChem1_Lecture/exercises/ch5_stereo1.pdf (Answers given on end of handout)Homework Equations Meso compounds have an internal plane of symmetryThe Attempt at a Solution Compounds #18 and #20...
  3. Jadaav

    Why Are Ionic Compounds Hard & Brittle?

    Why are ionic compounds hard and brittle ? For instance, an alloy is a mixture of 2 or more elements and thus does not break easily relative to original elements. Shouldn't the ionic compounds also be like the alloys ?
  4. V

    Examples of substances (elements or compounds) that sink in their liquid states.

    examples of substances (elements or compounds) that sink in their liquid states. (solid state is denser than liquid state compared to water) :smile:
  5. H

    Radioactively labeled compounds unsuitable?

    Some radioactively labeled compounds (such as 32 P-labeled ATP) are not suitable for studies with whole cells because they do not enter cells. Why? The presence of a radioactive isotope does not change the chemical properties of a molecule.
  6. A

    Functional groups of organic compounds

    Homework Statement find the functional groups in the following compound: Homework Equations C8H16O4The Attempt at a Solution I know there is an ether but there is also something else. What is it? I have tried to find a group that is in the compound, but I have had no luck. It seems to be only...
  7. A

    Identifying Unknown Compounds in a Lab

    Hello, I am looking for assistance from you chemistry maestros, geniuses, and experts on how to handle a 5-day lab of identifying unknown compounds using limited resources. We were given four unknown compounds and a list of fifty possibilities. I am not as interested as in you guys...
  8. R

    Who has a tip on how to remember compounds and their valencies when studying?

    Who has a tip on how to remember compounds and their valencies when studying?? urm, i suck at remembering the compounds and their valencies etc. any ideas on how i can remember them more efficiently? any notes or links welcome, i need to know how to tell the difference in phates, phites...
  9. U

    Predicting solubility of ionic compounds in ionic liquids

    This question probably belittles the complexity of the issue, but I thought I'd ask anyway: Are there any reasonable methods by which the solubility of ionic compounds (e.g., KCl, NaBr, CaO, etc.) in ionic liquids (e.g., 1-ethyl-3-methylimidazolium tetrafluoroborate, tetrabutylammonium...
  10. T

    Chemistry-Finding concentrations of two compounds

    Homework Statement Given balanced chemical reaction: Ba(NO3)2 (aq) + Na2SO4 (aq) → BaSO4 (s) + 2NaNO3 (aq) Suppose 200 mL of Ba(NO3)2 and 200 mL of Na2SO4 of unknown concentrations are mixed together and forms the reaction above. Then, there are 0.0120 M of NaNO3 produced, and 0.0004 M of...
  11. M

    What would be some degradation products of these compounds?

    http://img850.imageshack.us/img850/1073/39228673.png In terms of drug shelf life, what might those compounds degrade into over time? For compound 1, that the azole rings CH3 group as well as the carbons attached to the sulfur could undergo autooxidation to alcohols. I can also see that...
  12. B

    Why is the formation of ionic compounds exothermic?

    Hello everyone, I've been trying to figure out why when ionic compounds are formed that they are exothermic (meaning they give off heat). The only theory I have is that when the ions are coming together, the motion from them moving and possibly the friction of their surfaces making contact...
  13. A

    Describe chemical compounds as CHARGED, POLAR or NONPOLAR

    Ok, I thought the only two options in existence were Polar and Non-polar... and I'm being asked which ones are CHARGED? What does this mean? Example: NH4+ (ammonium), NO3- (nitrate), N2, O2, H2O Thanks!
  14. S

    Amphoteric Compounds: Ka of H2PO4 & HS Reaction Explained

    Homework Statement The Ka of H2PO4 is 6.3 * 10^-8. The Ka of HS is 1.3 * 10^-13. Write a formula for the reaction of these substances and explain your results. Both are amphoteric. The Attempt at a Solution The formula is: H2PO4 + HS <--> HPO4 + H2S I figured that the H2PO4 will...
  15. D

    Iodides inorganic compounds fluoresces

    Is there anyone who familiar with Iodides inorganic compounds that fluoresce. It can be metal Iodides, transition metal iodides, binary, ternary or higher compounds? Organometallic and organic compound are less preferable. Any link, paper will help. Thank you from advance
  16. S

    Carbon Compounds: Orbital & Bonding Energies Explained

    why carbon can form polymers and sillicon not? though both are tetra valent. explain this based on its orbital and bonding energies
  17. N

    Nomenclature of Organic Compounds: Significance of -#-yl and E/Z Isomerism

    Hi all, I have a question regarding the nomenclature of organic compounds. What is the significance of -5-yl in bicyclo[2,1,0]pent-5-ylbicyclo[3,3,0]octane ? In general, what is the significance of the # in -#-yl in compounds? Additionally, in (E)-1,2-diiodo-1methylcyclohexane, does the E...
  18. C

    What Determines the Colour of Compounds?

    I've come across the concept of complementary colours where if a compound absorbs one wavelength then to the eye, it will appear as its complementary colour. Heres a chart of complementary colours: so for example if a compound absorbs violet radiation, the compound will appear yellow. In...
  19. D

    Photoionization what will happen to compounds?

    photoionization...what will happen to compounds?? 1) when UV light falls on molecules such as SiO or Fe2O3,will photo electric effect take place or will the they ionize into ions or both?? does this depend on any factor like maybe the wavelength of light being used?? 2)how will positive...
  20. M

    Determining When Molecular Compounds Ionize When Dissolved Into Water

    Hello, This is a matter I have been having some difficulties with for the past few days. My question: How is it that I would go about distinguishing molecular compounds in regards to their capacity to ionize and yield hydrogen ions when dissolved into distilled water? For example, if...
  21. Saitama

    Find hybridisation of Carbon compounds

    Hello! How to calculate the hybridisation in carbon compounds? Most of the time whenever i try to find out the hybridisation i get a wrong answer. I think the usual way of finding hybridisation doesn't work with carbon compounds. Is there any other way?
  22. J

    Toxic chemical compounds used in products that you are aware of

    What are some dangerous chemical compounds and substances that manufactures put into products that you are aware of and recommend avoiding ? (Is there anything not mentioned here? What are some other toxic compounds?) -Plastic items such as shoes, plastic trash bags contain PolyVynyl Chloride...
  23. T

    Meso Compounds with an odd number of chiral centers

    I was learning about chirality in my organic chemistry class when we were talking about meso compounds. The professor stated that for a compound to be meso, you needed there to be two or more chiral centers. After thinking about it for a while, I can come up with abstract structures for meso...
  24. C

    Polar compounds that are insoluble in water

    I'm a bit confused about how polar molecules can be insoluble in water. Polar means they have a permanent dipole so I would have assumed that they would solvate water. An example of a polar insoluble compound is pyrantel embonate. Its used to treat hookworm and pinworm infections in the GI...
  25. L

    Which compounds are more basic than water?

    Homework Statement Which of these compounds is significantly more basic than water? I have 5 compounds here. I have (1) propane with a carbanion on the end, (2)the same molecule as that but with an adjacent double bond to oxygen (its on the middle carbon), (3) C-C-Ominus, (4) C-C-Sminus, and...
  26. P

    Magnetic Susceptibility of different compounds

    Can anyone link me to a table of a large amounts of different compounds with the magnetic susceptibility of each one? Thanks.
  27. S

    Mutiple Valences, Ionic compounds and Transition metals.

    So i was doing my school work earlier and i had trouble wrapping my head around this particular topic, even though i was able to finish all of it correctly, i want to make sure it sinks it well so i once again decided to approach these forums :) We were naming Ionic compounds, specifically...
  28. S

    Properties of some compounds

    Dear All, I am curious to know about some materials listed below- Mumetals, Permalloy, Supermalloy, Permendur, Perminvar and Sendust. I am interested to study there magnetic properties like permeability, hysteresis, temp. dependence of magnetism etc, if possible coefficient of...
  29. N

    Chemistry: Naming compounds. Need someone to double check my work please.

    Homework Statement Hi. I only have one more submission left in my homework. Can someone please check this problem real quick for me? DIRECTIONS: Write the formula for each of the following compounds. (Type your answer using the format Al(HSO4)3 for Al(HSO4)3.) PROBLEM: Ammonium Acetate MY...
  30. A

    Double Salts and Coordination Compounds

    This is an excerpt from the book I'm referring: "...when solutions containing two or more salts in stoichiometric (simple molecular) proportions are allowed to evaporate, crystals of new compounds separate out. These compounds are of two types : (1) Double Salts and (2) Coordination compounds."...
  31. A

    Why do absorptions cause compounds to be coloured.

    I don't understand how a handful of single wavelength absorptions could be enough to profoundly alter the colour of the compound. Since the visible light spectrum is continuous doesn't it contain billions of single wavelengths? For example copper atoms in solution appear blue because it absorbs...
  32. Z

    Naming Organic Compounds - 2,3-chloro-methyl-4-bromo pentene - Homework Help

    Homework Statement Name the following Compound Homework Equations I attached an image of the compound The Attempt at a Solution This is my attempt, although I don't know if it's correct or not, because I don't have an answer key. 2,3-chloro-methyl-4-bromo pentene but...
  33. D

    Cyclic Compounds: Which Shape is the Most Stable?

    Homework Statement C3H6 cyclopropane C4H8 cyclobutane C6H12 cyclohexane Looking at their bond angles, which do you think is most stable? The Attempt at a Solution I'm trying to examine their shapes - triangle, sqaure and hexagon, but I don't know which shape is more stable...
  34. Z

    Identifying Compounds in Benzoic Acid-Methanol Conversion

    My experiment converted Benzoic acid to methyl benzoate using methanol but after adding sodiumbicarb. ether, I am not quite sure what is in where. Is there methanol or ethanol in the ether layer? since I've read that sodium Carbonate (not bicarb) will not be soluble in ethanol would this mean...
  35. H

    Predicting missing boiling point in the following series of compounds:

    Homework Statement a) CH4 -164 C , SiH4 -112 C, GeH4, -90 C, SnH4, ? C. b) H2O ? C, H2S -61 C, H2Se -41 C, H2Te -2 C The Attempt at a Solution a)This was an assignment and the right answer was T= -75 C. I did a graph starting from CH4 to SnH4 and I know this because its going...
  36. G

    Certain compounds were responsible for different tastes

    I was wondering if certain compounds were responsible for different tastes. Like a certain one for bitter ,salty, sweet, and sour. Thanks for any info you can provide.
  37. S

    Toxic Compounds: Solids and Liquids

    Hi does exist some liquid or solid toxic compound? for toxic i don't mean mortal! Thanks
  38. D

    Solubility of organic compounds

    Homework Statement Rank the solubilities of these organic compounds from lowest to highest: Hydrocarbons, aldehydes, alcohols, carboxylic acid. The Attempt at a Solution I know that hydrocarbons is the lowest - it cannot form H bonds with itself nor can it form H bonds with water...
  39. V

    Precipitation reactions for sparingly soluble compounds?

    When 2 ionic solutions are mixed and the reaction gives a sparingly soluble product, it is possible to write an ionic equation for the mixing of the solutions.
  40. R

    Organic Chemistry: Stabillity of Nitrogen Containing Cyclic Compounds

    Homework Statement Pyridine and pyrrolidine react rapidly with dilute aqueous HCl to form the corresponding hydrochloride salts which are easily purified, isolated and stored in a charge. However, pyrrole, which is another nitrogen-containing heterocycle, does not form a hydrochloride salt...
  41. G

    Colour of complex compounds and crystal field theory

    Hi It is know that the colour exhibited by coordinate compound is because of d-d electron transitions. These d-d transition lead to absorption of photons of a paticular frequence. AND when a electron become exited due to absorption of photon it should radiate electromagnetic wave of frequency...
  42. T

    Writing Formulas for Ionic Compounds

    Homework Statement Of the following, which correctly shows an ion pair and the ionic compound the two ions form? Homework Equations a. Fe3+, O3+ = Fe2O3 b. Cr3+, I- = CrI c. Cu2+, O2- = Cu2O2 d. Sn4+, N3- = Sn4N3 The Attempt at a Solution a. Fe3+, O3+ = Fe2O3...
  43. L

    The compounds of acids are held together in ionic bonds?

    The strength of an acid is determined by the amount of it per volume ionizes right? So is it safe to say acids, when not in water, are composed of ions? So for example, HCL has the potential to be an acid,as it is made of a H ion and a CL ion, but cannot be until it reacts with water, because...
  44. L

    Chemical Compounds: Covalent & Ionic Bonding Explained

    There are two ways to form these: through Covalent and Ionic bonding, correct? But I have always wondered something about Ionic bonding, if two atoms are attracted to each other due to opposite charges, shouldn't they be close enough to make the electrons be attracted into the opposite atom and...
  45. S

    Organic II - Reaction of Aromatic Compounds

    Homework Statement The Attempt at a Solution I want to recognize the Cl as a good leaving group. After leaving, I get the ionized form of the chloroazirine reactant. Then, I want to draw some resonance structures to move the charge around the ring. I do not understand the...
  46. L

    Are there any organic compounds without carbon?

    Are there any compounds that are considered "organic," yet do not contain carbon?
  47. vishnu.mec

    Order of acidity in organic compounds

    HI! I want to know the order ofacidity of p-nitro phenol, acetic acid, picric acid and formic acid. Please help quickly. Thanks...
  48. C

    Formula and Combining Compounds

    Homework Statement What is the formula and name of the compound by combining Pb2+ and CrO42- Homework Equations none The Attempt at a Solution I thought it was Pb2(CrO4)2 - Lead Chromate. Why is this wrong and how do I correct it?
  49. C

    Question about modeling compounds ie: Play Doh

    I'm making something I can rest a camera on, face down, that needs to hold it in the same position upon being taken out and put back in. The camera has a "streamline" type design so I've decided to use some sort of molding that will fit its contours. I am at a loss as far as knowing what...
  50. E

    Identifyin unknown compounds

    I have my ch6 practical coursework coming up and we have to identify 6 compounds and theirs 8 all together that they could be. what test can i use to show I have diphenylmethanone, benzonitrile, ethyl benzenecarboxylate (aromatic ester) and ethanamide? I've been trying to think what i could...
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