Alkyne does not show cis-trans isomerism, the reason to be discussed. Concept Introduction: Alkyne: An unsaturated hydrocarbon containing a triple bond; only two substituents present on the triple bond. In order to predict the cis- or trans- isomer for any multiple bonds four substituents are must on the multiple bonds.

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Definition Definition Molecules that have multiple bonds between their carbon atoms. Alkenes are hydrocarbons with a double bond between two adjacent carbon atoms (R 2 C=CR 2 ), whereas alkynes are hydrocarbons with a triple bond between two adjacent carbon atoms R-C=C-R . These two groups are known as unsaturated hydrocarbons. They have fewer hydrogen atoms when compared with alkanes with same number of carbon atoms. The general molecular formula for an unsaturated hydrocarbon can be represented as C n H 2n +2 .

Chapter 13, Problem 13.45AP

Interpretation Introduction

Interpretation:

Alkyne does not show cis-trans isomerism, the reason to be discussed.

Concept Introduction:

Alkyne: An unsaturated hydrocarbon containing a triple bond; only two substituents present on the triple bond. In order to predict the cis- or trans- isomer for any multiple bonds four substituents are must on the multiple bonds.

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Fura-2 Fluorescence (Arbitrary Unit) 4500 4000 3500 3000 2500 2000 1500 1000 500 [Ca2+]=2970nM, 25°C [Ca2+] 2970nM, 4°C [Ca2+]=0.9nM, 25°C [Ca2+] = 0.9nM, 4°C 0 260 280 300 340 360 380 400 420 440 Wavelength (nm) ← < The figure on the LHS shows the excitation spectra of Fura-2 (Em = 510 nm) in 2 solutions with two different Ca2+ ion concentration as indicated. Except for temperature, the setting for excitation & signal acquisition was identical.< ப a) The unit in Y-axis is arbitrary (unspecified). Why? < < b) Compare & contrast the excitation wavelength of the Isosbestic Point of Fura-2 at 25 °C & 4 °C. Give a possible reason for the discrepancy. < c) The fluorescence intensity at 25 °C & 4 °C are different. Explain why with the concept of electronic configuration. <

Answer 2

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Definition Definition Molecules that have multiple bonds between their carbon atoms. Alkenes are hydrocarbons with a double bond between two adjacent carbon atoms (R 2 C=CR 2 ), whereas alkynes are hydrocarbons with a triple bond between two adjacent carbon atoms R-C=C-R . These two groups are known as unsaturated hydrocarbons. They have fewer hydrogen atoms when compared with alkanes with same number of carbon atoms. The general molecular formula for an unsaturated hydrocarbon can be represented as C n H 2n +2 .

Chapter 13, Problem 13.45AP

Interpretation Introduction

Interpretation:

Alkyne does not show cis-trans isomerism, the reason to be discussed.

Concept Introduction:

Alkyne: An unsaturated hydrocarbon containing a triple bond; only two substituents present on the triple bond. In order to predict the cis- or trans- isomer for any multiple bonds four substituents are must on the multiple bonds.

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Answer 3

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Definition Definition Molecules that have multiple bonds between their carbon atoms. Alkenes are hydrocarbons with a double bond between two adjacent carbon atoms (R 2 C=CR 2 ), whereas alkynes are hydrocarbons with a triple bond between two adjacent carbon atoms R-C=C-R . These two groups are known as unsaturated hydrocarbons. They have fewer hydrogen atoms when compared with alkanes with same number of carbon atoms. The general molecular formula for an unsaturated hydrocarbon can be represented as C n H 2n +2 .

Chapter 13, Problem 13.45AP

Interpretation Introduction

Interpretation:

Alkyne does not show cis-trans isomerism, the reason to be discussed.

Concept Introduction:

Alkyne: An unsaturated hydrocarbon containing a triple bond; only two substituents present on the triple bond. In order to predict the cis- or trans- isomer for any multiple bonds four substituents are must on the multiple bonds.

Expert Solution & Answer

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Check out a sample textbook solution

See solution

Answer 4

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Definition Definition Molecules that have multiple bonds between their carbon atoms. Alkenes are hydrocarbons with a double bond between two adjacent carbon atoms (R 2 C=CR 2 ), whereas alkynes are hydrocarbons with a triple bond between two adjacent carbon atoms R-C=C-R . These two groups are known as unsaturated hydrocarbons. They have fewer hydrogen atoms when compared with alkanes with same number of carbon atoms. The general molecular formula for an unsaturated hydrocarbon can be represented as C n H 2n +2 .

Chapter 13, Problem 13.45AP

Interpretation Introduction