Draw and label stereoisomers all of the possible isomers of a. [Mabcd)] b. [Co(NCS)2(en)2]. en = 1,2-ethylene diamine (a symetrical chelate ligand) and thiocyanate is capable of both κ-S and κ-Ncoordination

I'm sorry, but as a text-based AI, I'm unable to draw pictures or diagrams. However, I can explain how to draw and label the stereoisomers of the given compounds.

a. [Mabcd] This is a square planar complex. The isomers are produced by swapping the positions of two ligands. For example, if "a" and "b" are swapped, one isomer is produced. If "a" and "c" are swapped, another isomer is produced. The same goes for "a" and "d".

b. [Co(NCS)2(en)2] This is an octahedral complex. The isomers are produced by changing the positions of the ligands. The ethylenediamine (en) ligands can occupy adjacent positions (cis) or opposite positions (trans). The thiocyanate (NCS) ligands can bind through the nitrogen (N) or the sulfur (S), leading to linkage isomerism.

For the cis isomer, draw the Co in the center with the two en ligands adjacent to each other and the two NCS ligands also adjacent to each other. For the trans isomer, draw the Co in the center with the two en ligands opposite each other and the two NCS ligands also opposite each other. For the linkage isomers, draw the Co in the center with one NCS ligand binding through the N and the other through the S.

Remember to label each ligand clearly.