<p>Dear Editors and Reviewers:</p><p>Thank you for your letter and concerning our manuscript entitled “A two-dimensional cadmium(II) polymer based on nicotinic acid and thiocyanate ligands”. The main corrections in the paper and the responds to the reviewer’s comments are as flowing:</p><p>Responds to the reviewer’s comments:</p><p>Authors synthesized a novel Cd(II) complex which coordinated with nicotinic acid and thiocyanate ligands. The structure of this compound was determined clearly by single crystal X-ray analysis. Authors also described about 2D- and 3D-network structure formed by hydrogen bonding and Cd- ligand coordination.</p><p>There is NO serious problem in manuscript and structure analysis. To accept, however, I have some requests commented below. ===Comments=== 1) Scheme of (I) Please correct a scheme of (I) because the formula in structural unit is different from that determined by structure analysis. There are two nicotinic acid molecules and a water molecule in a structural unit. Response: Thanks for yours comments, we have corrected the scheme of (I). </p><p>2) L.7 In abstract, "(" is missing in formula, {[C6H5NO2)2][Cd(SCN)2].H2O}. Response: We have made correction according to the Reviewer’s comments: “A cadmium- thiocyanate complex, {[C6H5NO2)2][Cd(SCN)2]·H2O} was synthesized by the reaction of nicotinic acid, cadmium nitrate tetrahydrate and potassium thiocyanide in aqueous solution” in line 7.</p><p>3)L.35 The molar ratio is not stoichiometry. Please mention or refer about it, if it is correct. Response: Considering the Reviewer’s suggestion, we have made correction: “The title compound was obtained from an aqueous solution containing 1:1:3 mol equivalent of nicotinic acid, cadmium nitrate tetrahydrate and potassium thiocyanide”.</p><p>4)L.52 Delete standard deviation from 180.00(6). Because Cd atom is on inversion center, linear trans-angle is always 180deg. Response: We have made correction according to the Reviewer’s comments: “linear trans-angles [180.00°]”. </p><p>5)L.73-75 Authors described the difference of the number of ring in per grid between (I) and [Cd(dmen) (SCN)2]n. But I think the important is not the number of ring but the coordination motif of ligand. Nicotinic acid is unidentate and dmen is bidentate ligand. A dmen molecule coordinates with a Cd atom on cis position. On the other hand, two nicotinic acid molecules coordinate on trans position. This cause the difference of the motif of 2D-network and may affect the formation of 3D-network. Authors should describe the difference of the form of rings, and other examples of ring motifs if you know. Response: Considering the Reviewer’s suggestion, we have made correction: “This also differs from the two-dimensional polymeric sheet of [Cd(dmen)(SCN)2]n (dmen=N,N- dimethylethylenediamine) (Mondal et. al., 2000), which the 2-D sheet was formed through the bidentate dmen ligand and single SCN− bridges. It should be pointed out that the bidentate dmen molecule coordinates with a Cd atom on cis position, which is different from our reported compound with two unidentate nicotinic acid molecules coordinate on trans position”.</p><p>6)L.91 In figure 1, symmetry operation (iii) may not be z+1/2 but z-1/2. Please check Response: Thanks for yours comments, we have corrected these mistakes.</p><p>7) L.118 In table 1, Tmin and Tmax are the same. Is it correct? Please check. Response: Considering the Reviewer’s suggestion, we have made correction: “Tmin=0.684, Tmax =0.758” are shown in the CIF file.</p><p>Special thanks to you for your good comments.</p><p>We tried our best to improve the manuscript and made some changes in the paper. Once again, thank you very much for your comments and suggestions. </p><p>Best regards,</p><p>Lin Zhou</p>