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(+/-)-3-methyl-3-phenyl-pentan-2-one, also known as 3-methyl-3-phenylbutan-2-one, is an organic compound with the molecular formula C12H16O. It is a chiral ketone, meaning it has two enantiomeric forms that are mirror images of each other. (+/-)-3-methyl-3-phenyl-pentan-2-one is characterized by a ketone functional group (C=O) at the 2-position, a phenyl group (C6H5) attached to the 3-position, and a methyl group (CH3) also at the 3-position. It is a colorless to pale yellow liquid with a fruity, floral odor and is used as a fragrance ingredient in various applications, such as perfumes and cosmetics. The compound is synthesized through various chemical reactions, including the condensation of acetophenone with acetone. It is important to note that the (+/-) notation indicates that the compound is a racemic mixture, containing equal amounts of both the R and S enantiomers.

828-39-7

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828-39-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 828-39-7 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 8,2 and 8 respectively; the second part has 2 digits, 3 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 828-39:
(5*8)+(4*2)+(3*8)+(2*3)+(1*9)=87
87 % 10 = 7
So 828-39-7 is a valid CAS Registry Number.

828-39-7Relevant academic research and scientific papers

Rearrangement of Ketones. Part 4. Aluminium Chloride Catalysed Rearrangement of Some 2,2-Dialkyl-1-phenyl-1-propan-1-ones

Fernandez-Monreal, Maria C.,Ruiz, Maria P.

, p. 440 - 472 (2007/10/02)

Four α,α,α-trisubstituted acetophenones ((1):R1=R2=R3=CH3; (2):R1=R2=CH3, R3=CH2CH3; (3):R1=R2=CH3, R3=CH2Ph; (4):R1=CH3, R2=CH2CH3, R3=CH2Ph) were prepared.Ketones (1)-(4) were treated with aluminium chloride to induce rearrangement to alkyl ketones.The phenyl ketones behaved as follows: (1) gave 3-methyl-3-phenylbutan-2-one (7), (2) gave 3-methyl-3-phenylpentan-2-one (8) and 2-methyl-2-phenylpentan-3-one (9), (3) gave 3-methyl-3,4-diphenylbutan-2-one (10) and 3-methyl-1,3-diphenylbutan-2-one (11), and (4) gave 3-methyl-1,3-diphenylpentan-2-one (12), 2-methyl-1,2-diphenylpentan-3-one (13) and 3-benzyl-3-phenylpentan-2-one (14).A tentative mechanism for the rearrangement is proposed.

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