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Cropped relaxed saturated single vacancy structures. The single vacancy saturated by a) hydrogen (SV–H), b) oxygen (SV–O), c) hydroxide (SV–OH), d) carboxyl (SV–COOH), e) annulene (SV–O–), f) ketone + annulene (SV=O+–O–), and g) diketone (SV=2O) groups.
