5. Aromatic Compounds p: 153 Aromatic was used to described some fragrant compounds in early 19th century Not correct: later they are grouped by chemical behavior(unsaturated compounds that undergo substitution rather than addition Current: distinguished from aliphatic compounds by electronic configuration
4.1 Addition of hx to Alkenes. p100 Hydrohalogenation General reaction mechanism: electrophilic addition Attack of electrophile(such as hBr)on T bond of alkene Produces carbocation and bromide ion Carbocation is an electrophile, reacting with nucleophilic bromide ion
The TCP/P Protocol Suite Transmission Control Protocol Internet protocol Developed by darPa to connect Universities and Research Labs Four Layer model Applications Telnet, FTP, email, etc Transport TCP, UDP Network IP ICMP, IGMP Link
Information content of a random variable Random variable x Outcome of a random experiment Discrete R V takes on values from a finite set of possible outcomes PMF: P(X=y)=Py) How much information is contained in the event X=y? Will the sun rise today Revealing the outcome of this experiment provides no information Will the Celtics win the NBa championship? Since this is unlikely, revealing yes provides more information than revealing Events that are less likely contain more information than likely events
