Thermal Stability and Bonding in Organocopper l Compounds

tliere is ample evidence tliat orgatiocoppet compounds ate usually highly 

Hiis simplibed view can explain stability trends and differences between various organocopperit) compounds, as well as tlie inbuence of bulky ot coordinating substituents oifiio to tlie coppet-catbon bond on tlie stablity of arylcoppet compounds. Hiis interpretation of die coppet-catbon bond can also be applied to tlie bnding of sp falkyL e.g., CH2SiMe- ), sp fC-C R) [40], and odiet sp fvinyl) groups [41, 42]. 

Recent tlieotetical developments sucli as DFT metliods, can of course provide mote advanced and precise undetstanding of tliese interactions. Hence, Nakaniuta et al. have tecently used computational metliods to explain and forecast sttucTute-teactivity telationsbips in otganocoppet reagents fCbapt. 10) [28, 43]. 

On tlie basis of tills inforniation, tediniques for tlie s7iitliesis of pure copper compoimds were devdoped. Hie following parameters played an imporianL role  

Ii is consequently noi possible lo give one general s7iitlietic procedure ifor a de-ta tled discussion see refs. 29 and 45). Ii also became evideni tliai tlie order of ad-dition of tlie reagems can play a crucial role, wbicli is nicely illustraied by tlie following examples. 

Asa consequence of its electronic configuration a variety of coordination numbers and geometries have been observed for copper(I) compounds especially for inorganic representatives (see Fig. 1.3) [32]. In the organometallic chemistry of copper the linear and trigonal coordination geometries in particular though distorted towards T-shaped are frequently encountered. 

Today there is ample evidence that organocopper compounds are usually highly 

Trigonal pyramidal Sea-saw Square ptanar Square pyramidal Fig. 1.3. Various coordination geometries of copper(I) compounds. 

Recent theoretical devdopments such as DFT methods, can of course provide more advanced and precise understanding of these interactions. Henc Nakamura et al. have recently used computational methods to explain and forecast structure-reactivity relationships in organocopper reagents (Chapt 10) [28,43]. 

---