Apr 4, 2016. The benzyl carbon is the carbon immediately proximate to a phenyl ring. Given this definition, #C_6H_5CH_2Br# is benzyl bromide; #C_6H_5CH_2OH# is benzyl alchohol, #C_6H_5CH_2NH_2# is benzylamine. Benzylic substitution can offer some enhancement to stability and reactivity.
Numeric keypad. A numeric keypad, number pad, numpad, or ten key, is the palm-sized, 17-key section of a standard computer keyboard, usually on the far right.It provides calculator-style efficiency for entering numbers.he arrangement of digits on numeric keypads with the 7-8-9 keys two rows above the 1-2-3 keys is derived from calculators and cash registers. It is notably different from the layout of telephone Touch-Tone keypads which have the 1-2-3 keys on top and 7-8-9 keys on the third row.
Candidate Key. Candidate keys are defined as the set of fields from which primary key can be selected. It is an attribute or set of attribute that can act as a primary key for a table to uniquely identify each record in that table.andidate Key. Candidate keys are defined as the set of fields from which primary key can be selected. It is an attribute or set of attribute that can act as a primary key for a table to uniquely identify each record in that table.