"3,4''-diphenyl-" refers to a chemical structure where two phenyl groups (benzene rings) are connected through a carbon-carbon bond at the 3rd and 4th positions. This specific arrangement is common in various organic compounds and can significantly influence the molecule's properties, such as its reactivity, stability, and physical characteristics. The term is often used to describe a part of a larger molecule, indicating the presence of this particular phenyl-phenyl linkage. The "3,4'' notation specifies the positions of the carbon atoms in the phenyl rings that are connected, which is crucial for understanding the molecule's structure and potential applications in fields such as pharmaceuticals, materials science, and chemical research.
The CAS Registry Mumber 5660-40-2 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 5,6,6 and 0 respectively; the second part has 2 digits, 4 and 0 respectively. Calculate Digit Verification of CAS Registry Number 5660-40: (6*5)+(5*6)+(4*6)+(3*0)+(2*4)+(1*0)=92 92 % 10 = 2 So 5660-40-2 is a valid CAS Registry Number.