Question

Using hard-soft acid/base concepts, determine the strongest metal-ligand bond in the 5. following pairs. Justify your answer. a. Ti-PPh3 vs. Fe-PPh3 b. Sc-Cl vs. Fe-Cl c. Li-OMe vs. K-OMe d. Cu-I vs Cu-Cl e. Nb-Me vs Pt-Me

Answer 1

hrd-Sott acicd/ aase Concpt Pecoding to harel aedt pre fers to bind cuth hard oade Soft aeidprefer to bimd cuith <opt bale . mel Simce Pphg co a coft bae So iCurt prefer fo iamd ceth sopt acdd, Here s harol aeibf Mtermeiate . so Pph3 Prefeo beteseen T and Fe and Fe f imd -ceuith leas hard is Fe -PPh3 bcnd stro ngest and talole ore Fe PPh Sc c and to. Fe-cl boder ine r mtermdeiate prafer to 6md auth -rees Aerod C bose So Fta acid Fa Pmong Se and Fe nd more fouoroke. Se sharod acid aeid loocler ne. Fe c Fe is So Fe-c s m ore -gtable . and i & Thus stvongelt éond Li-OMe C . auc prepe fo éind auth strang hard acid much more sfronger acisł So han Li-o Me Tuur mmore Stable -eurd Li-oNe bond Srongest

CuI Cu-c Simce Cu s a bodey lind aeld FacPrefer to bind cuith toolerbnl thus oase Posong Soft bast omd toodir une Cu-c ,nd is assteng est oond e Nb-Me pt -Me Sin ee Soft batc -Me a pmefer bo eind cuth soft aud . pt, No and Nois hard aeid ard soft acid PG thus strages Pt Me Lond