What is the electronic configuration of Ca2+ ?

What are the configurations around Carbon 1 and Carbon 2 in the following molecule?

H₂C Li N(i-C3H7)2 CH3OCH₂OCH 3

} LIOH -Cl tN NO Hasoy socla E13N CI

Select the bonds in the 3D representation of methyl urethane below that are multiple bonds. (Hint: Consider the number of bonds attached to an atom in the image compared to the normal valence of that atom. In a valid structure, the number of bonds to an atom will equal the valence of that atom.) • Gray = C: white = H; red = 0; blue = N; dark green = Cl; brown = Br; light green = F; purple = 1; yellow = S: orange = P. • Double click to select bonds. You can zoom in and out using the mouse scroll wheel (or pinch to zoom on touch screens). ●

why is this S configuration, can you explain how it is so

When B-carotene is oxidised in vivo, it breaks in half and forms two molecules of retinal (vitamin A), which is a precursor to the pigment in the retina responsible for vision. The conjugated system of retinal consists of eleven C atoms and one O atom; see the structure of the molecule here: H3C CH3 ÇH3 ÇH3 `CH3 In the ground state of retinal, each level up to n = 6 is occupied by two electrons. Assuming an average inter-nuclear distance of 140 pm, use the particle-in-a-box model to calculate: a. the separation in energy between the ground state and first excited state in which one electron occupies the state with n = 7, and b. the frequency of the radiation required to produce a transition between these two states.

Among the given organic molecules, Identify the number of molecules which are optically active. Br CI CI c=C= :C C Br H. Br ČI c C= C. Br H. Br Br Br エー

Are the two carbon atoms of C2H5Cl equivalent?

What is the R,S configuration?