(Decacarbonyl)(1-isopropyl-2-phenyl-1,2,5,6-tetrahydroacenaphtho [5,6-cd][1,2]diphosphole)ditungsten(0)

Round 1

Reviewer 1 Report

This manuscript reports the synthesis and structural characterization of a binuclear tungsten(0) complex with an asymmetric bridging 1,2-diphosphole ligand. This manuscript is well prepared and can be accepted for publication if the following comments are addressed:

1.      The maximum residual density of 9.04 eA-3 reported might be caused “by residual absorption artefacts, unaccounted for twinning, disorder, wrongly assigned atom types, missing hydrogen atoms and other model errors.” The authors should do their best to remove this B alert from the checkcif file or give some detailed account for this alert in the X-ray crystallographic section.

2.      The two phosphorus atoms become chiral centers upon coordination to the metal centers. The authors should identify the chiralities for these two atoms shown in Figure 3, although there are pairs of enantiomers in the solid state structure.

Minor editing of English language required.

Author Response

Thank you kindly for your review report. We have address your comments below with our responses in red.

The maximum residual density of 9.04 eA-3 reported might be caused “by residual absorption artefacts, unaccounted for twinning, disorder, wrongly assigned atom types, missing hydrogen atoms and other model errors.” The authors should do their best to remove this B alert from the checkcif file or give some detailed account for this alert in the X-ray crystallographic section.

We thank you for spotting our error in omitting the vrf comments in the cif to explain the results. We have uploaded a new checkcif with the alert level B's explained.

Author Response: 4 crystals tried, best result presented -result fine for
conclusions drawn- probably crystal quality issues.

Author Response: Data left in for transparency purposes.

 The two phosphorus atoms become chiral centers upon coordination to the metal centers. The authors should identify the chiralities for these two atoms shown in Figure 3, although there are pairs of enantiomers in the solid state structure.

We have added that the structure shown in Figure 3 is the (R,R) isomer. We have also added a short statement explaining that the solid state structure has a pair of enantiomers (both the (R,R) and (S,S))

Minor editing of English language required.

We have made some small edits to the best of our ability.

Round 2

Reviewer 1 Report

I agree the changes the authors have made and recommend publication of this manuscript in Molbank.