django-photobooth 0.0.0-pre-alpha, 2, Webcam interface for Django projects using UserBooth (http://blog.vamapaull.com/?p=355) ...... KappaCUDA 1.5.0, 2, Module to give easy access to NVIDIA CUDA from Python using the Kappa Library. ..... Naghni 0.1,
I tried to make sense of the Four Books, until love arrived, and it all became a single syllable. Yunus
Idea Transcript
CH 310 N
The index of hydrogen deficiency (IHD): the sum of the number of rings and pi bonds in a molecule To determine IHD, compare the number of hydrogens in an unknown compound with the number in a reference hydrocarbon of the same number of carbons and with no rings or pi bonds the molecular formula of the reference hydrocarbon is CnH2n+2
IH D =
(H
re fe re n c e
- H
m o le c u le )
2
• for each atom of a Group 7 element (F, Cl, Br, I), add one H • no correction is necessary for the addition of atoms of Group 6 elements (O,S) to the reference hydrocarbon • for each atom of a Group 5 element (N, P), add one hydrogen
Problem: isopentyl acetate has a molecular formula of C7H14O2. Calculate its IHD • reference hydrocarbon C7H16 O O • IHD = (16-14)/2 = 1 Isopentyl acetate
Problem: calculate the IHD for niacin, molecular formula C6H6N2O • reference hydrocarbon C6H16 O • IHD = (16 - 6)/2 = 5 N H2 N Niacin 1