Can someone please explain the Rule of 13 in terms of identifying compounds in Mass Spec in Organic chemistry?
The rule of 13 states that the formula of a compound is a multiple n of 13 (the molar mass of CH) plus a remainder r.
The Rule of 13 is a simple procedure for tabulating possible chemical formula for a given molecular mass.[10] The first step in applying the rule is to assume that only carbon and hydrogen are present in the molecule and that the molecule comprises some number of CH "units" each of which has a nominal mass of 13. If the molecular weight of the molecule in question is M, the number of possible CH units is n and
where r is the remainder. The base formula for the molecule is
and the degree of unsaturation is
A negative value of u indicates the presence of heteroatoms in the molecule and a half-integer value of u indicates the presence of an odd number of nitrogen atoms. On addition of heteroatoms, the molecular formula is adjusted by the equivalent mass of carbon and hydrogen. For example, adding N requires removing CH2 and adding O requires removing CH4.
Can someone please explain the Rule of 13 in terms of identifying compounds in Mass Spec...
Can someone please interpret the IR Spectrum, Mass Spec, and NMR data to help me find the unknown compound and its structure?
Please help identify the organic compound using mass spec, ir spec, CNMR, and HNMR. From looking at the mass spec, I believe the molar mass of the uknown organic compound to be 122 g/mol From looking at CNMR, I believe there are at least 5 carbons for each of the 5 peaks. I recall from class that there can be more due to symmetry, but am not certain how to tell. Above are all of the graphs given to me...
Help on Mass Spectrometry Data Analysis. Please explain. For the following mass spec data: a) Circle the structure(s) consistent with the mass spectrum (more than one answer may be possible): b) Draw the structure(s) of the most abundant fragments (base peaks) in the mass spectrum. If two compounds are consistent with the spectrum, please draw the base peak for each structure)
i dont understand the alphabetical ordering in organic chemistry can someone please explain the rules?
can someone please explain this to me? Which of the following compounds were synthesized via an ALDOL reaction?! Use the picture below to choose your answer(s) он о он он ОН о Ph он
Can someone draw the mechanism for this organic chemistry 2 problem and explain the steps to me? CH30 CH3OH
organic chemistry answer is D. Can someone please explain why? 3. Which reaction would proceed the fastest? (A) CH3CH2OCH2 + OH → CH3CH2OH + COCH3 (B) CH2CH2SCHz + OH → CH3CH2OH + SCH; (C) CH3CH2N(CH3)2 + OH -- CH3CH2OH + "N(CH3)2 (D) O CH3CH2OSC6H.CH3 + OH - © CHỊCH,OH + OSCH,CH
Organic Chemistry Multisynthesis problem can someone please list the reagents and full multistep mechanism for this problem image attached HO
Can someone please explain this! 15. Circle one of the following charged compounds which is most stable. (3 Points) Sleast acidic +2 Which is the stronger influence for your choice? a) Resonance or b) Induction hyperconjugation)? (2 Points)
please go into some depth about how you used the mass spec to elucidate the structure (I'm really bad at Mass spec). thanks!! 13. Elucidate each structure below, based on the information provided. (12 pts, 4 pts each) Unknown Compound A Key Mass Spec Peak: Key IR Stretch: NMR Signals triplct (2)-2.0 ppm multiplet (2) 1.4 ppm triplet (3)-0.8 ppm m/z 69 sharp, weak 2245 cm