Operational Amplifier (UA741) clipping well under voltage rails asymmetrically EDIT: had same issue with different opamp
The big problem with the schematic as drawn is that your zero-volt reference is free to float anywhere between either supply rail. Try adding low-ish value resistors &lt;&lt; 1k, if possible, across C1 and C2. This will hold the ground reference voltage a bit better.

If that improves things then consider either a split rail supply or replacing the lower resistor with a 5 V Zener diode to hold the zero-volt line at +5 V relative to the negative supply.







simulate this circuit &ndash; Schematic created using CircuitLab

Figure 1. Resistive and Zener ground generation.