For Claude, the main issue affecting Completeness was missing certain conditions or concentrations, and regarding Correctness, Claude made mistakes related to misinterpreting methods or temperature values. For instance, as shown in Figure , Claude incorrectly identified the synthesis method, mistaking liquid-liquid diffusion (used for synthesizing single crystals) for a method applicable to polycrystals, indicating that LLMs can confuse similar locations or content, leading to 'cross-contamination' in their outputs. As a result, although Claude generally captured more synthesis details, it occasionally struggled to accurately interpret specific experimental procedures. For Gemini, the primary issue in Completeness was missing amounts of chemicals. Figure shows how Gemini incorrectly interpreted "DMF-H2O mixture (v/v 1/1, 1 mL)" as 1 mL each of DMF and H2O instead of a total volume of 1 mL. In terms of Correctness, Gemini also faced challenges with incorrect quantities, often due to ambiguous measurements. These errors indicate that Gemini's thorough approach sometimes led to incorrect extrapolation of details.