Which molecule(s) contain(s) no aromatic ring(s)? There may be more than one. NH2 A B C D E

Need help

Do

Specify whether the two structures are resonance contributors to the same resonance hybrid. Be sure to explain your reasoning. If yes, be sure to specify which is preferred and why. H2C=NH2

QUESTION 7 Which of the following is not true about anti-aromatic molecules? Anti-aromatic molecules must have 4N+2 pi electrons where N = 0, 1, 2, 3.... Anti-aromatic molecules must be cyclic Anti-aromatic molecules have to be planar Anti-Aromatic molecules are unstable compared to non-aromatic molecules

Estimate the heat released when 1-butene(CH3CH2CHCH2) reacts with bromine to give CH3CH2CHBrCH2Br. Bond enthalpies are CH : 412 kJ/mol;   CC : 348 kJ/mol;CC : 612 kJ/mol;  CBr : 276 kJ/mol;BrBr : 193 kJ/mol. 1.317 kJ/mol 2.507 kJ/mol 3.95 kJ/mol 4.288 kJ/mol 5.181 kJ/mol

1. Use the image provided to answer the question in detail: a) Two of the earliest drug molecules featured in Chapter 8 are Vicodin and Heroin, whose chemical structures are very similar.  Both of these molecules contain an amine functional group and several rings.  Indicate the number of aromatic rings in each structure, and identify the amine functional group in each molecule as primary, secondary, or tertiary.

Name compounds 1 and 2 below. Include stereochemical labels.

Answer this question:How to draw the line bond formula or lewis structure of a methyl ketone with the chemical formula C6H5C3H5O? (also taking into consideration the solubility test and chemical test results provided below) Based on the results of the solubility tests the compound is insoluble in water, 10% NaOH and 10% HCl but soluble in concentrated H2SO4. The functional group/class is identified to be Methyl Ketone, based on the results of the chemical tests on Table 2. CHEMICAL TEST OBSERVATIONS +(compound tested positive for the chemical reaction)/ otherwise (-)  Molisch test turbid colorless solution - 2,4-DNP test formation of orange-yellow precipitates + Tollen’s test turbid colorless solution - Ninhydrin test clear pale-yellow solution - iodoform test clear pale-yellow solution +

Classify the following structure as either "aromatic", "antiaromatic", or "nonaromatic". How many pi electrons are in the structure? Assume the structure is planar. NH 2-