The use of radical cross-coupling in retrosynthetic analysis has experienced a renaissance over the past decade . This is due to the simple, convergent disconnections of challenging C-C bonds leading back to ever-present functional groups such as halides, acids, amines, alcohols, and olefins (Figure ) . In practice, all of these widely employed radical precursors require some sort of exogenous redox activation mode. Regardless of the choice of oxidative or reductive activation, this generally requires stoichiometric chemical additives, catalysts to facilitate photoinduced electron transfer, or electrochemistry . A simpler means to achieve radical crosscoupling without the use of exogenous redox methods would be highly attractive based on first principles reasoning as it would reduce cost and the complexity of reaction setup. Alkyl diazenes are a prime candidate for radical precursors that could achieve such an objective . These species have been invoked since the late 1930's yet their use in organic synthesis has been sporadic and mainly relegated to 2e --defunctionalization methods such as the classic Wolff-Kishner reduction and related reactions (Figure , left). A provocative report on the use of in situ derived diazenes from sulfonyl hydrazides was reported by Taber in 1993 wherein the radical cyclization of ketone 1 to octahydroindane 2 was achieved (Figure , right) . Building on this precedent, we wondered if free radicals derived without redox-initiation from these intermediates could be enlisted in metal catalyzed cross-coupling events. Herein we disclose a remarkably general platform for redox-neutral radical cross-couplings driven by in situ derived alkyl diazenes to forge a variety of C-C bonds. Alkyl sulfonyl hydrazides are easily derived from carbonyl compounds and alcohols (N-sulfonyl regioisomers can be used interchangeably); these stable, crystalline substances can now be employed to generate a variety of useful sp 3 -sp 3 , sp 3 -sp 2 , and sp 3 -sp linkages in a practical, "dump and stir" fashion, obviating the need for any external redox-activation. Table vividly illustrates the versatility of sulfonyl hydrazides as redox-neutral coupling partners in six valuable C-C bond forming events. Each of these methods could warrant their own separate disclosure to describe their optimization and development. For the sake of brevity, this initial report describes an inaugural scope for each new reaction. A discussion of their optimization can be found in the Supplementary Materials and a detailed mechanistic study for each will be forthcoming. The simplest of radical couplings, namely Giese-type additions to unsaturated species was demonstrated first (Table , top). For this reaction, dtbbpy was employed in concert with Ni(dme)Cl2 along with Et3N (3.0 equiv.) to furnish five representative adducts in 35-65% yield . Interestingly, the yield of this reaction was significantly reduced in the absence of a Ni/L system. Next, the direct formation of C(sp 3 )-C(sp 3 ) linkages was explored using both alkyl halides and alkyl redox-active esters (RAEs) as coupling partners (Table , bottom) . this reaction represents perhaps the most simple and inexpensive means of forming saturated C-C bonds (especially challenging 2°-2° linkages) . A notable aspect of this coupling approach is that no exogenous redox chemistry is necessary even though RAEs and alkyl halides have historically required reductive radical generation .