The first thought that I had was how harsh the highlights on his cheek and bottom of his hand were, along with the blown out tee and blown out wall on top. Looks like direct flash was used. I feel that you can definitely still achieve the shot without these distracting elements.
The conversion is affected by what you feed into your post-process software to begin with, and because of the harsh raw product, the final product will also look harsh.
Composition-wise, I think this crop is quite suitable - a tight crop for a tense situation captured, I think it works quite well.
i feel that black & white shots aren't easy to take and convert from colour. but if i had read and learnt properly B&W shots need blown whites being part of the picture, which you do have in the picture.
no offence intended, but the sofa and the little's boys skin look about the same colour tone to me.
I have to disagree here. B&W shots need not exhibit blown highlights all the time in order to look good, but they must exhibit good tonal range and contrast.
The first example is one where there is good tonality range, and while the sky eventually does fade to white, I believe it's not blown out (255, 255, 255) white.
The second is a street shot, that I believe works very well in black and white. Again, no intention to blow out any highlights within the frame.
cheguthamrin, let me know if you want these examples removed.