Abstract The synthesis of two new potential silane coupling agents is described and commented on. These agents are HOSiPcOSi‐(CH 3 ) 2 CH 2 CH 2 C 6 H 4 CH 2 I‐ m and p and HOSiPcOSi(CH 3 ) 2 ‐CH 2 CH 2 C 6 H 4 CH 2 NHCH 2 CH 2 NH 2 ‐ m and p (Pc = phthalocyaninato ligand). In addition, a discussion of agents of the general class to which these two agents belong is given. In this discussion some of the special features of agents of this class are pointed out, e.g., the octahedral coordination of the silicon atoms in the agents having the potential to oxygen‐bridge to glass surfaces. Special features of the glass‐polymer linkages which these agents have the potential to form are also pointed out. Finally, the synthesis of the model isomer mixture HOSi‐PcOSi(CH 3 ) 2 CH 2 CH 2 C 6 H 4 CH 2 N (CH 2 CH 3 ) 2 ‐ m and p is described, and a very brief discussion of this model mixture is given.