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38824-30-5

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38824-30-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 38824-30-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,8,8,2 and 4 respectively; the second part has 2 digits, 3 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 38824-30:
(7*3)+(6*8)+(5*8)+(4*2)+(3*4)+(2*3)+(1*0)=135
135 % 10 = 5
So 38824-30-5 is a valid CAS Registry Number.

38824-30-5Relevant articles and documents

Conformational analysis of 3-substituted-2,3,4,5-tetrahydro-1-benzoxepin by 1H and 13C nuclear magnetic resonance

Lachapelle, A.,St-Jacques, M.

, p. 2575 - 2594 (2007/10/02)

2,3,4,5-Tetrahydro-1-benzoxepin (8) and its 3-substituted derivatives (9-13) have been studied by 1H and 13C dynamic nuclear magnetic resonance in a few solvent systems.The results show that, while 8 and its methyl derivative 9 exist solely in chair forms (C for 8 and Ce:Ca (96:4) for 9), the twist-boat (TB) conformation contributes significantly to the conformational equilibra of the derivatives 3-methoxy 10 (Ca:Ce:TB, 70:20:10), 3,3-dimethyl 11 (C:TB, 90:10), 3,3-methylmethoxy 12 (Ca:Ce:TB, 89:4:7), and 3,3-dimethoxy 13 (C:TB, 92:8).The analysis of several factors (steric, electrostatic, and electronic) on the conformational behaviour of these molecules shows why the TB form is a viable conformational alternative to destabilized chair forms in this benzoxepin system.

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