Organic Chemistry Answers

A chemist adds 105.0mL of a 0.817mol/L sodium carbonate Na2CO3

 solution to a reaction flask. Calculate the mass in grams of sodium carbonate the chemist has added to the flask. Round your answer to 3 significant digits. please show steps thank you

 In a flexible-walled container, 300 L of gas is prepared at 600 mm Hg and 200 oC. The gas is placed in a tank under high pressure. When the tank cools to 20 oC, the pressure of the gas is 30 atm. What is the new volume of the gas?

What can we deduce from a 17% yield percentage?

Consider a 1.245 g sample of glucose (C6H12O6)

a. calculate moles of glucose in the sample

b. Moles of carbon in 1 mole glucose

c. moles and mass of carbon in the sample

d. glucose molecule in the sample

When [Fe(CO)5] is refluxed with cyclopentadiene, compound A is formed which has the empirical formula C8H6O3Fe and a complicated 1H-NMR spectrum. Compound A readily loses CO to give compound B with two 1H-NMR resonances, one at negative chemical shift (relative intensity 1) and one at around 5 ppm (relative intensity 5). Subsequent heating of B results in the loss of H2 and the formation of compound C. Compound C has a single 1H-NMR resonance and the empirical formula C7H5O2Fe. Compounds A, B, and C all have 18 valence electrons: identify them and explain the observed spectroscopic data

Na[W(η 5 -C5H5)(CO)3] reacts with 3-chloroprop-1-ene to give a solid, A, which has the molecular formula [W(C3H5)(C5H5)(CO)3]. Compound A loses carbon monoxide on exposure to light and forms compound B, which has the formula [W(C3H5)(C5H5)(CO)2]. Treating compound A with hydrogen chloride and then potassium hexafluorophosphate, K+PF6 − , results in the formation of a salt, C. Compound C has the molecular formula [W(C3H6)(C5H5)(CO)3]PF6. Use this information and the 18-electron rule to identify the compounds A, B, and C. Sketch a structure for each, paying particular attention to the hapticity of the hydrocarbons.

2-ethyl-1-propanol structural formula

The reaction of Br2/CCl4 to cyclohexene would produce which compound(s) represented below by structure

Why is less caffeine actually isolated than is suggested by the calculation? 

The complex [(FeCp (CO) 2] 2 (Fp2), displays IR carbonyl absorption bands at 1760 and 2000 cm – 1. (A) What is its molecular structure? (B) Fp2 in solution is in equilibrium with a its isomeric structure, which is slightly higher energy What is this structure? (c) How are molecules that have isomeric structures, such as those in question (b) of Fp2, characterized by rapidly reaching equilibrium? What is the consequence? (d) Photolysis of Fp2 leads to the loss of a CO ligand and the new complex obtained exhibits only one IR carbonyl absorption band at 1760 cm – 1. What is the molecular structure of this new complex? e) Heating Fp2 to 180 ° C leads to a quaternary complex that has lost 2 CO per Fp2 complex and exhibits a strong IR absorption band at 1620 cm – 1. What is the structure of the new complex and the number of valence electrons of each the four Fe atoms?