Imaging element containing a blocked photographically useful compound

An imaging element comprising an imaging layer having associated therewith a compound represented by the Structure I:

• wherein:
• PUG is a photographically useful group;
• LINK 1 and LINK 2 are linking groups;
• TIME is a timing group;
• 1 is 0 or 1;
• m is 0, 1, or 2;
• n is 0 or 1;
• 1+n≧0;
• w is 1 or 2;
• t is 0, 1 or 2;
• T is independently selected from a substituted or unsubstituted (referring to the following T groups) alkyl group, cycloalkyl group, aryl, or heterocyclic group, an inorganic monovalent electron withdrawing group, an inorganic divalent electron withdrawing group capped with at least one C1 to C10 organic group, or T is joined with W, C* or R12 to form a ring;
• or when t is 2, two T groups can combine to form a ring;
• and when t is not 2, the necessary number of hydrogens are present instead of T groups;
• R12 is hydrogen, or a substituted or unsubstituted alkyl, cycloalkyl, aryl or heterocyclic group;
• C* is a tetrahedral carbon;
• and
• W is independently selected from a monovalent electron withdrawing group, a divalent electron withdrawing group, an aryl group substituted with one to seven electron withdrawing groups, or a substituted or unsubstituted heteroaromatic group;
• when W is a divalent electron withdrawing group, an aryl group, or a heteroaromatic group, it can combine with C*, R12, or T to form a ring;
• when w is 2, the two W groups can form a ring;
• and when w is 1, the C* may be attached to one or two hydrogen atoms or to one hydrogen atom and one substituted or unsubstituted alkyl group that is not an electron withdrawing group or aryl group that is not substituted with an electron-withdrawing group.